John Wesley on Luke 7:24

When the messengers were departed - He did not speak the following things in the hearing of John's disciples, lest he should seem to flatter John, or to compliment him into an adherence to his former testimony. To avoid all suspicion of this kind, he deferred his commendation of him, till the messengers were gone; and then delivered it to the people, to prevent all imaginations, as if John were wavering in his judgment, and had sent the two disciples for his own, rather than their satisfaction.