John Gill Commentary Matthew 11:4

"And Jesus answered and said unto them, Go and tell John the things which ye hear and see:" — Matthew 11:4 (ASV)

Jesus answered and said to them
Not by an express declaration, that he was the Messiah that was to come, and they were not to look for any other; but he bids them

go, and show John again, those things which you hear and see .
Christ would have them go back to John in prison, and relate to him the doctrines which they had heard preached by him to the poor; and the miracles which they had seen with their own eyes, then wrought by him; as well as many others, which were attested to them by credible witnesses; for there were at that time about Christ, that had infirmities, plagues, and evil spirits, and that were blind, and he instantly cured them in their presence; see (Luke 7:21) .