Jubilate
Psalm 100.
Contemporary
Book of Common Prayer (1979), page 82
Be joyful in the Lord, all you lands; * serve the Lord with gladness and come before his presence with a song. Know this: The Lord himself is God; * he himself has made us, and we are his; we are his people and the sheep of his pasture. Enter his gates with thanksgiving; go into his courts with praise; * give thanks to him and call upon his Name. For the Lord is good; his mercy is everlasting; * and his faithfulness endures from age to age.
Traditional
Book of Common Prayer (1979), page 82
Be joyful in the Lord, all ye lands; * serve the Lord with gladness and come before his presence with a song. Be ye sure 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. O go your way into his gates with thanksgiving and into his courts with praise; * be thankful unto him and speak good of his Name. For the Lord is gracious; his mercy is everlasting; * and his truth endureth from generation to generation.
History
Psalm 100 calls all the earth into God’s courts with thanksgiving. Cranmer added it to Morning Prayer in his second prayer book, in 1552, as an alternative to the Song of Zechariah after the second lesson. It stayed there until 1979, when the prayer book moved it to the start of the office as an alternative to the Venite.
Many people know it best as a hymn: William Kethe’s paraphrase “All people that on earth do dwell,” first printed around 1561 and sung to the Genevan tune still called Old Hundredth.
Sources: Book of Common Prayer (1552), Morning Prayer; Book of Common Prayer (1928), Morning Prayer; Book of Common Prayer (1979), Morning Prayer: Rite Two; Hymnology Archive, “All People That on Earth Do Dwell”.