Verses with the word thanksgiving in the Old Testament (19 verses):

Leviticus 7:12
If he offer it for a thanksgiving, then he shall offer with the sacrifice of thanksgiving unleavened cakes mingled with oil, and unleavened wafers anointed with oil, and cakes mingled with oil, of fine flour, fried.

Leviticus 7:13
Besides the cakes, he shall offer for his offering leavened bread with the sacrifice of thanksgiving of his peace offerings.

Leviticus 7:15
And the flesh of the sacrifice of his peace offerings for thanksgiving shall be eaten the same day that it is offered; he shall not leave any of it until the morning.

Leviticus 22:29
And when ye will offer a sacrifice of thanksgiving unto the LORD, offer it at your own will.

Nehemiah 11:17
And Mattaniah the son of Micha, the son of Zabdi, the son of Asaph, was the principal to begin the thanksgiving in prayer: and Bakbukiah the second among his brethren, and Abda the son of Shammua, the son of Galal, the son of Jeduthun.

Nehemiah 12:8
Moreover the Levites: Jeshua, Binnui, Kadmiel, Sherebiah, Judah, and Mattaniah, which was over the thanksgiving, he and his brethren.

Nehemiah 12:46
For in the days of David and Asaph of old there were chief of the singers, and songs of praise and thanksgiving unto God.

Psalms 26:7
That I may publish with the voice of thanksgiving, and tell of all thy wondrous works.

Psalms 50:14
Offer unto God thanksgiving; and pay thy vows unto the most High:

Psalms 69:30
I will praise the name of God with a song, and will magnify him with thanksgiving.

Psalms 95:2
Let us come before his presence with thanksgiving, and make a joyful noise unto him with psalms.

Psalms 100:4
Enter into his gates with thanksgiving, and into his courts with praise: be thankful unto him, and bless his name.

Psalms 107:22
And let them sacrifice the sacrifices of thanksgiving, and declare his works with rejoicing.

Psalms 116:17
I will offer to thee the sacrifice of thanksgiving, and will call upon the name of the LORD.

Psalms 147:7
Sing unto the LORD with thanksgiving; sing praise upon the harp unto our God:

Isaiah 51:3
For the LORD shall comfort Zion: he will comfort all her waste places; and he will make her wilderness like Eden, and her desert like the garden of the LORD; joy and gladness shall be found therein, thanksgiving, and the voice of melody.

Jeremiah 30:19
And out of them shall proceed thanksgiving and the voice of them that make merry: and I will multiply them, and they shall not be few; I will also glorify them, and they shall not be small.

Amos 4:5
And offer a sacrifice of thanksgiving with leaven, and proclaim and publish the free offerings: for this liketh you, O ye children of Israel, saith the Lord GOD.

Jonah 2:9
But I will sacrifice unto thee with the voice of thanksgiving; I will pay that that I have vowed. Salvation is of the LORD.