John the Apostle
John 6:39BSB·traditional attribution

And this is the will of Him who sent Me, that I shall lose none of those He has given Me, but raise them up at the last day.

John Calvin Reformed @genevareformer

39. And this is the will of the Father. He now testifies, that this is the design of the Father, that believers may find salvation secured in Christ; from which again it follows, that all who do not profit by the doctrine of the Gospel are reprobate.

Matthew Henry Presbyterian @wholebiblehenry

Whether this conference was with the Capernaites, in whose synagogue Christ now was, or with those who came from the other side of the sea, is not certain nor material; however, it is an instance of Christ's condescension that he gave them leave to ask him questions, and did not resent the interruption as an affront, no, not from his common hearers, though not his immediate followers.

Commenting on John 6:28-59

John Gill Reformed Baptist @doctorgill

And this is the will of him that sent me,.... The Vulgate Latin adds, "of my Father"; and all the Oriental versions read only, "and this is the will of my Father"; this is his declared, his revealed will in the Gospel, which the sons of men are made acquainted with, as the other was his secret will, which was only known to the Son till he discovered it.