Verses with the word certainly in the Old Testament (30 verses):

Genesis 18:10
And he said, I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him.

Genesis 26:28
And they said, We saw certainly that the LORD was with thee: and we said, Let there be now an oath betwixt us, even betwixt us and thee, and let us make a covenant with thee;

Genesis 43:7
And they said, The man asked us straitly of our state, and of our kindred, saying, Is your father yet alive? have ye another brother? and we told him according to the tenor of these words: could we certainly know that he would say, Bring your brother down?

Genesis 44:15
And Joseph said unto them, What deed is this that ye have done? wot ye not that such a man as I can certainly divine?

Genesis 50:15
And when Joseph's brethren saw that their father was dead, they said, Joseph will peradventure hate us, and will certainly requite us all the evil which we did unto him.

Exodus 3:12
And he said, Certainly I will be with thee; and this shall be a token unto thee, that I have sent thee: When thou hast brought forth the people out of Egypt, ye shall serve God upon this mountain.

Exodus 22:4
If the theft be certainly found in his hand alive, whether it be ox, or ass, or sheep; he shall restore double.

Leviticus 5:19
It is a trespass offering: he hath certainly trespassed against the LORD.

Leviticus 24:16
And he that blasphemeth the name of the LORD, he shall surely be put to death, and all the congregation shall certainly stone him: as well the stranger, as he that is born in the land, when he blasphemeth the name of the Lord, shall be put to death.

Joshua 9:24
And they answered Joshua, and said, Because it was certainly told thy servants, how that the LORD thy God commanded his servant Moses to give you all the land, and to destroy all the inhabitants of the land from before you, therefore we were sore afraid of our lives because of you, and have done this thing.

Judges 14:12
And Samson said unto them, I will now put forth a riddle unto you: if ye can certainly declare it me within the seven days of the feast, and find it out, then I will give you thirty sheets and thirty change of garments:

1 Samuel 20:3
And David sware moreover, and said, Thy father certainly knoweth that I have found grace in thine eyes; and he saith, Let not Jonathan know this, lest he be grieved: but truly as the LORD liveth, and as thy soul liveth, there is but a step between me and death.

1 Samuel 20:9
And Jonathan said, Far be it from thee: for if I knew certainly that evil were determined by my father to come upon thee, then would not I tell it thee?

1 Samuel 23:10
Then said David, O LORD God of Israel, thy servant hath certainly heard that Saul seeketh to come to Keilah, to destroy the city for my sake.

1 Samuel 25:28
I pray thee, forgive the trespass of thine handmaid: for the LORD will certainly make my lord a sure house; because my lord fighteth the battles of the LORD, and evil hath not been found in thee all thy days.

1 Kings 1:30
Even as I sware unto thee by the LORD God of Israel, saying, Assuredly Solomon thy son shall reign after me, and he shall sit upon my throne in my stead; even so will I certainly do this day.

2 Kings 8:10
And Elisha said unto him, Go, say unto him, Thou mayest certainly recover: howbeit the LORD hath shewed me that he shall surely die.

2 Chronicles 18:27
And Micaiah said, If thou certainly return in peace, then hath not the LORD spoken by me. And he said, Hearken, all ye people.

Proverbs 23:5
Wilt thou set thine eyes upon that which is not? for riches certainly make themselves wings; they fly away as an eagle toward heaven.

Jeremiah 8:8
How do ye say, We are wise, and the law of the LORD is with us? Lo, certainly in vain made he it; the pen of the scribes is in vain.

Jeremiah 13:12
Therefore thou shalt speak unto them this word; Thus saith the LORD God of Israel, Every bottle shall be filled with wine: and they shall say unto thee, Do we not certainly know that every bottle shall be filled with wine?

Jeremiah 25:28
And it shall be, if they refuse to take the cup at thine hand to drink, then shalt thou say unto them, Thus saith the LORD of hosts; Ye shall certainly drink.

Jeremiah 36:29
And thou shalt say to Jehoiakim king of Judah, Thus saith the LORD; Thou hast burned this roll, saying, Why hast thou written therein, saying, The king of Babylon shall certainly come and destroy this land, and shall cause to cease from thence man and beast?

Jeremiah 40:14
And said unto him, Dost thou certainly know that Baalis the king of the Ammonites hath sent Ishmael the son of Nethaniah to slay thee? But Gedaliah the son of Ahikam believed them not.

Jeremiah 42:19
The LORD hath said concerning you, O ye remnant of Judah; Go ye not into Egypt: know certainly that I have admonished you this day.

Jeremiah 42:22
Now therefore know certainly that ye shall die by the sword, by the famine, and by the pestilence, in the place whither ye desire to go and to sojourn.

Jeremiah 44:17
But we will certainly do whatsoever thing goeth forth out of our own mouth, to burn incense unto the queen of heaven, and to pour out drink offerings unto her, as we have done, we, and our fathers, our kings, and our princes, in the cities of Judah, and in the streets of Jerusalem: for then had we plenty of victuals, and were well, and saw no evil.

Lamentations 2:16
All thine enemies have opened their mouth against thee: they hiss and gnash the teeth: they say, We have swallowed her up: certainly this is the day that we looked for; we have found, we have seen it.

Daniel 11:10
But his sons shall be stirred up, and shall assemble a multitude of great forces: and one shall certainly come, and overflow, and pass through: then shall he return, and be stirred up, even to his fortress.

Daniel 11:13
For the king of the north shall return, and shall set forth a multitude greater than the former, and shall certainly come after certain years with a great army and with much riches.