John Mark
Mark 10:28ESV·traditional attribution

Peter began to say to him, “See, we have left everything and followed you.”

Matthew Henry Presbyterian @wholebiblehenry

I. Here is a hopeful meeting between Christ and a young man; such he is said to be (Mat 19:20, Mat 19:22), and a ruler (Luk 18:18), a person of quality. Some circumstances here are, which we had not in Matthew, which makes his address to Christ very promising. 1.

Commenting on Mark 10:17-31

John Gill Reformed Baptist @doctorgill

But he shall receive an hundred fold now in this time,.... Not that he should have an hundred houses, brethren, &c. but that he should enjoy that even in this present life, which was an hundred times better than any of the things mentioned; namely, houses, and brethren, and sisters, and mothers, and children, and lands; See Gill on Mat 19:29 it is added here, with persecutions.

William Burkitt Anglican @expositoryburkitt

The apostles having heard our Saviour's command to sell all and give to the poor, St. Peter, in the name of the rest, tells Christ, that they had left all to follow him. Where note, How St. Peter magnifies that little which he had left for Christ, and ushers it in with a note of admiration: Lo! we have left all.