פירוש על בראשית 34:5

והחריש יעקב עד בואם, he refrained from starting a quarrel until his sons would have been informed of what happened so that they could be on their guard against their adversaries.

עד בואם, until they came home. Jacob sent a message to them asking them to return home.

ויעקב שמע כי טמא, Shechem, who had already been mentioned (hence his name does not need to be repeated here and a pronoun will do) and that as a result of what he did, Dinah had been defiled by an uncircumcised person who had been intimate with her.