Give thanks to The Lord, for He is good! His faithful love endures forever.
I Chronicles 16:34 (NLT)

Obscene stories, foolish talk, and coarse jokes; these are not for you. Instead, let there be thankfulness to God.
Ephesians 5:4 (NLT)

Be thankful in all circumstances, for this is God’s will for you who belong to Christ Jesus.
I Thessalonians 5:18 (NLT)

Don’t be weary in prayer; keep at it, watch for God’s answers, and remember to be thankful when they come.
Colossians 4:2 (TLB)

“Amen!” they said, “Blessing, and glory, and wisdom, and thanksgiving, and honor, and power, and might, be to our God forever and forever. Amen!”
Revelation 7:12 (TLB)