New Defender's Study Bible Notes
9:7 pool of Siloam. This pool still exists in Jerusalem, receiving water through Hezekiah’s tunnel (II Kings 20:20) from the Gihon Spring. Its name is said, apparently providentially to refer to Messiah, “the One Sent.” Possibly it was named because of the miraculous deliverance of the city from the Assyrians during Hezekiah’s reign (II Kings 19:35).
9:7 and came seeing. This is the sixth miracle of creation to be selected and described by John to demonstrate Christ’s deity. See the note on the first such miracle (John 2:11; also John 20:30, 31).