Here are a few verses:-
Psa 100:4 Enter into His gates with thanksgiving, into His courts with praise; be thankful to Him; bless His name.
Col 3:15 And let the peace of God rule in your hearts, to which you also were called in one body, and be thankful.
Heb 12:28 Let us be thankful, then, because we receive a kingdom that cannot be shaken. Let us be grateful and worship God in a way that will please him, with reverence and awe;
1Th 5:18 be thankful in all circumstances. This is what God wants from you in your life in union with Christ Jesus.
Psa 106:47 Save us, O LORD our God, and bring us back from among the nations, so that we may be thankful and praise your holy name.
Psa 70:4 May all who come to you be glad and joyful. May all who are thankful for your salvation always say, "How great is God!"
Psa 40:16 May all who come to you be glad and joyful. May all who are thankful for your salvation always say, "How great is the LORD!"
1Ch 16:35 Say to him, "Save us, O God our Savior; gather us together; rescue us from the nations, so that we may be thankful and praise your holy name."