Then Jacob offered sacrifice—literally, slew a slaying, in ratification of the covenant—upon the mount, and called his brethren to eat bread. The sacrificial meal afterwards became an integral part of the Hebrew ritual (Exodus 14:3-8; Exodus 29:27, Exodus 29:28; Le Exodus 10:14, Exodus 10:15).
And they did eat bread, and tarried all night in the mount.