“¶ Then answered Peter, and said vnto him, Behold, we haue forsaken all, and followed thee, what shall we haue therefore?”
1611 King James Version (KJV)
Mt 19:27 Behold, we have forsaken all. Compare Mr 10:28-29 Lu 18:28-30. The apostles had left all they had for Christ. The case of the rich young man suggested Peter's question.