John Gill Commentary Luke 7:19

"And John calling unto him two of his disciples sent them to the Lord, saying, Art thou he that cometh, or look we for another?" — Luke 7:19 (ASV)

And John calling unto him two of his disciples
Which were a sufficient number to be sent on an errand, to ask a question, and report the answer, or bear witness to any fact they should see, or hear done.

Sent them unto Jesus, saying, art thou he that should come, or look we
for another?
not that he doubted that Jesus was the Messiah; nor was it for his own satisfaction so much that he sent these disciples of his with this question, but for theirs; and to remove all doubt and hesitation from them about Christ.