'Thankful' in the Bible

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

Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.

And let the peace of God rule in your hearts, to the which also ye are called in one body; and be ye thankful.