Verses with the word thank in the Old Testament (7 verses):

1 Chronicles 16:4
And he appointed certain of the Levites to minister before the ark of the LORD, and to record, and to thank and praise the LORD God of Israel:

1 Chronicles 16:7
Then on that day David delivered first this psalm to thank the LORD into the hand of Asaph and his brethren.

1 Chronicles 23:30
And to stand every morning to thank and praise the LORD, and likewise at even:

1 Chronicles 29:13
Now therefore, our God, we thank thee, and praise thy glorious name.

2 Chronicles 29:31
Then Hezekiah answered and said, Now ye have consecrated yourselves unto the LORD, come near and bring sacrifices and thank offerings into the house of the LORD. And the congregation brought in sacrifices and thank offerings; and as many as were of a free heart burnt offerings.

2 Chronicles 33:16
And he repaired the altar of the LORD, and sacrificed thereon peace offerings and thank offerings, and commanded Judah to serve the LORD God of Israel.

Daniel 2:23
I thank thee, and praise thee, O thou God of my fathers, who hast given me wisdom and might, and hast made known unto me now what we desired of thee: for thou hast now made known unto us the king's matter.