Jesus uses a question to mildly rebuke them. Jesus was telling them not to doubt that he was alive. The word "heart" is a metonym for a persons' mind. AT: "Do not doubt in your minds!" or "Stop doubting!" (See: [[rc://en/ta/man/translate/figs-rquestion]] and [[rc://en/ta/man/translate/figs-metonymy]])
Jesus asks them to confirm by touch that he is not a ghost. It may be helpful to combine and reorder these two sentences. AT: "Touch me and feel that I have flesh and bones that a ghost would not have"
It is understood that his hands and feet contained the nail marks from his crucifixion that would prove it was really Jesus. This can be made explicit. AT: "the wounds in his hands and his feet"