A.T. Robertson Commentary Luke 18:22

"And when Jesus heard it, he said unto him, One thing thou lackest yet: sell all that thou hast, and distribute unto the poor, and thou shalt have treasure in heaven: and come, follow me." — Luke 18:22 (ASV)

One thing thou lackest yet (ετ εν σο λειπε). Literally, one thing still fails thee or is wanting to thee. An old verb with the dative of personal interest. Mr 10:21 has here υστερε σε, which see. It was an amazing compliment for one who was aiming at perfection (Matthew 19:21). The youth evidently had great charm and was sincere in his claims.

Distribute (διαδος). Second aorist active imperative of διαδιδωμ (give to various ones, δια-). Here Mark and Matthew simply have δος (give). The rest the same in all three Gospels.