2 Corinthians 9:15: "Thanks be to God for his inexpressible gift!"
1 Corinthians 11:23-26: "23 For I received from the Lord what I also delivered to you, that the Lord Jesus on the night when he was betrayed took bread, 24 and when he had given thanks, he broke it, and said, 'This is my body which is for you. Do this in remembrance of me.' 25 In the same way also he took the cup, after supper, saying, 'This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.' 26 For as often as you eat this bread and drink the cup, you proclaim the Lord's death until he comes."
2 Corinthians 8:9: "For you know the grace of our Lord Jesus Christ, that though he was rich, yet for your sake he became poor, so that you by his poverty might become rich."
1 John 4:13: "By this we know that we abide in him and he in us, because he has given us of his Spirit."
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The text is public domain:
O Jesus, blessed Lord, to TheeMy heartfelt thanks forever be,Who hast so lovingly bestowedOn me Thy body and Thy blood.
Break forth, my soul, for joy and say:What wealth is come to me this day!My Savior dwells within my heart:How blessed am I! How good Thou art!
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The sources for this hymn text are very easy to distinguish: the first half of the first verse is from 2 Corinthians 9:15; the second half is from the passage from 1 Corinthians 11; the first half of the second verse is drawn from 2 Corinthians 8:9; and the second half is from 1 John 4:13.