Psalm 145:15-17: "15 The eyes of all look to you, and you give them their food in due season. 16 You open your hand; you satisfy the desire of every living thing. 17 The LORD is righteous in all his ways and kind in all his works."
John 6:35-38: "35 Jesus said to them, 'I am the bread of life; whoever comes to me shall not hunger, and whoever believes in me shall never thirst. 36 But I said to you that you have seen me and yet do not believe. 37 All that the Father gives me will come to me, and whoever comes to me I will never cast out. 38 For I have come down from heaven, not to do my own will but the will of him who sent me.'"
Revelation 19:7-9: "7 Let us rejoice and exult and give him the glory, for the marriage of the Lamb has come, and his Bride has made herself ready; 8 it was granted her to clothe herself with fine linen, bright and pure' - for the fine linen is the righteous deeds of the saints.
"9 And the angel said to me, 'Write this: Blessed are those who are invited to the marriage supper of the Lamb.' And he said to me, 'These are the true words of God.'"
+++
The passage from Psalm 145 is referred to in the first line: "Feed Thy children, God most holy." The text from John 6 is the source for the title "Bread of Life" ("O Thou Bread of Life from heaven, / Bless the food Thou here hast given!"), and the passage from Revelation 19 appears at the end of the hymn: "Till with saints in heav'nly splendor / At Thy feast due thanks we render."