Matthew 16:15

15. Whom say ye Now comes the important question for which the whole occasion is appointed. Observe, the question is put to them all and not to Peter alone. It is, “Whom say YE?” not whom sayest thou? The disciples as an entire body have, thus far, been concerned. As this question is put to them all, of course the answerer, Peter, is simply the spokesman or representative of them all. He is the foreman of the jury, who answers the Judge and pronounces the verdict for all the rest; and he receives an investiture from Christ for them all. See note on Matthew 4:18.