1,252. The Shomrim

194:10 A person who is watching over the deceased (i.e., the shomer) is exempt from reciting Shema and Shemoneh Esrei, as well as from all other mitzvos in the Torah. This is true even if they are not related since a person who is occupied in one mitzvah is exempt from other mitzvos. If there are two people watching the deceased (shomrim), one watches while the other recites Shema and Shemoneh Esrei.

194:11 It is prohibited to eat in the room where the deceased is unless there's a partition. This is true not just of a meal but even a snack, a piece of fruit or a drink of water. Those watching the deceased must be informed about this. They are also not permitted to recite any brachos in the presence of the deceased.