John 6:30

They said, &c. , i.e., those of the crowd who were bolder than the rest, who knew and thought less of Jesus. For they had seen the miracle of the multiplication of the loaves the day before, whereby Christ had fed five thousand men, but upon this they set small value, and ask for one still greater and more wonderful. As though they had said, "Thou, 0 Jesus, askest of us a great, nay a stupendous thing, namely that we should believe in Thee as the Messiah and the Son of God. But for this the miracle of the loaves which Thou wroughtest yesterday, does not suffice. For Moses did a similar, yea, a greater work. Show us therefore a heavenly and Divine and worthy sign, by which God may attest that Thou art His Son, and our Messiah." Therefore they add by way of explanation,