In the fourth verse, the text here is "Your daily mercies let them share." "Share" is sung with a melisma (D C), and this gives a sense of its meaning since the word is "share[d]" between the two notes.
Here's the third musical phrase:
In the third verse, the text here is "This golden ring that none may break." Here, "break" is sung with a melisma (D C), giving a sense of its meaning.
In the fourth verse, the text is "By this their vow divide their care." "Care" is sung with the same melisma, and this gives a sense of its being "divide[d]."
