Verses with the word testify in the Old Testament (14 verses):

Numbers 35:30
Whoso killeth any person, the murderer shall be put to death by the mouth of witnesses: but one witness shall not testify against any person to cause him to die.

Deuteronomy 8:19
And it shall be, if thou do at all forget the LORD thy God, and walk after other gods, and serve them, and worship them, I testify against you this day that ye shall surely perish.

Deuteronomy 19:16
If a false witness rise up against any man to testify against him that which is wrong;

Deuteronomy 31:21
And it shall come to pass, when many evils and troubles are befallen them, that this song shall testify against them as a witness; for it shall not be forgotten out of the mouths of their seed: for I know their imagination which they go about, even now, before I have brought them into the land which I sware.

Deuteronomy 32:46
And he said unto them, Set your hearts unto all the words which I testify among you this day, which ye shall command your children to observe to do, all the words of this law.

Nehemiah 9:34
Neither have our kings, our princes, our priests, nor our fathers, kept thy law, nor hearkened unto thy commandments and thy testimonies, wherewith thou didst testify against them.

Job 15:6
Thine own mouth condemneth thee, and not I: yea, thine own lips testify against thee.

Psalms 50:7
Hear, O my people, and I will speak; O Israel, and I will testify against thee: I am God, even thy God.

Psalms 81:8
Hear, O my people, and I will testify unto thee: O Israel, if thou wilt hearken unto me;

Isaiah 59:12
For our transgressions are multiplied before thee, and our sins testify against us: for our transgressions are with us; and as for our iniquities, we know them;

Jeremiah 14:7
O LORD, though our iniquities testify against us, do thou it for thy name's sake: for our backslidings are many; we have sinned against thee.

Hosea 5:5
And the pride of Israel doth testify to his face: therefore shall Israel and Ephraim fall in their iniquity: Judah also shall fall with them.

Amos 3:13
Hear ye, and testify in the house of Jacob, saith the Lord GOD, the God of hosts,

Micah 6:3
O my people, what have I done unto thee? and wherein have I wearied thee? testify against me.