He was not honest in reporting the full amount of the sale to the apostles. This implied information can be made explicit: "He secretly kept back part of the sale money." (See: [[rc://en/ta/man/translate/figs-explicit]])
Putting a gift at the apostles's feet symbolized giving them the authority over how the gift should be used. (See: [[rc://en/ta/man/translate/figs-metonymy]])