"sat down at the table." It was the custom for a relaxed meal such as this dinner for men to eat while lying down comfortably around the table. (See: [[rc://en/ta/man/translate/figs-explicit]])
The Pharisees had a rule that people must wash their hands in order to be ceremonially clean before God. AT: "wash his hands" or "wash his hands in order to be ritually clean" (See: [[rc://en/ta/man/translate/figs-explicit]])