Psalms 100:1-5
1 Make a joyful noise unto the LORD, all ye lands.
2 Serve the LORD with gladness: come before his presence with singing.
3 Know ye that the LORD he is God: it is he that hath made us, and not we ourselves; we are his people, and the sheep of his pasture.
4 Enter into his gates with thanksgiving, and into his courts with praise: be thankful unto him, and bless his name.
5 For the LORD is good; his mercy is everlasting; and his truth endureth to alla generations.
C. A Processional Hymn (see Psalms 100:4). The Ps. invites the Israelites to be joyful, declares Yahweh is the only God and the Maker of all, and that He is specially the God of Israel.
Psalms 100:2. Serve: offer sacrifice to (see Isaiah 19:21; Isaiah 19:23).
Psalms 100:3. we are his: this suits the context better, but He hath made us, i.e. made us what we are, viz. the people of redemption, is also a possible reading.