Rashi, Exodus 3:1
אחר המדבר: להתרחק מן הגזל שלא ירעו בשדות אחרים:
After the free pastureland: to distance himself from [the possibility of] theft, so that they [the flocks] would not pasture in others’ fields. — [from Exodus Rabbah 2:3] [translation by Judaica Press]

Suggested Discussion Questions:

What does this source teach about our responsibility for our and others' possessions?

Time Period: Medieval (Geonim through the 16th Century)