The references to the Lord as our shepherd are numerous in Scripture, such as Psalm 23, Psalm 77:20, Isaiah 40:11, and Christ’s discourse in John 10.
In stanza 3, the reference to a vine calls to mind Jesus’ discourse in John 15 (“I am the vine…you are the branches”), and also Hosea 10:1.
The repeated reference in each stanza to the “radiance of your face” reminds us of the Aaronic benediction in Numbers 6:24-27. But we also think of many references that refer to the turning of God’s face because of our sinfulness: see Isaiah 54:8, 57:17, 59:2 and 64:7. See also Micah 3:4.