John Calvin Commentary Genesis 31:54

"And Jacob offered a sacrifice in the mountain, and called his brethren to eat bread: and they did eat bread, and tarried all night in the mountain." — Genesis 31:54 (ASV)

And called his brethren to eat bread. In courteously receiving his relatives, by whom he had been ill-treated, as his guests, Jacob showed his kindness. Moses also suggests that it was by the special favor of God that, after the most dreadful storm which threatened the holy man with destruction, a placid serenity suddenly shone forth.

To the same cause must be attributed what immediately followed: Laban departed in a friendly manner. For in this way the Lord openly revealed himself as the guardian of his servant, since he wonderfully delivered him as a lost sheep from the jaws of the wolf.

Indeed, not only was Laban's fury appeased, but he also showed paternal affection, as if he had been changed into a new man.