Берешит 31:52 Комментарий: Rashi, Radak, Rabbeinu Bahya & Chizkuni

אם אני THAT I WILL NOT — Here the word אם is used in the sense of אשר “that”, as (Genesis 24:33) “until that (אם) I have spoken my words”.

עד...אם אני, the expression אם אני and אם אתה in this verse must be understood as if the Torah had written שאני and שאתה, “that I,“ “that you.” We find the word אם used in that sense in Genesis 24,19 עד אם כלו לשתות, “until they have finished drinking,” as we pointed out there.

עד הגל הזה ועדה המצבה, “both the mound and the monument are to serve as witness, etc.” After Lavan had already said in verse 50 that G’d is a witness, etc., why did Lavan have to repeat here “This mound or monument is a witness?” Lavan did so only in order to make both heaven and earth his witness. We find that the prophet Samuel did something similar when he made the Jewish people take an oath (Samuel I 12,5 and again in verse 6 of that chapter) when he said to them: “the Lord is witness and His anointed is witness, etc.”

לרעה FOR EVIL — For evil you may not pass, but for trading purposes (as e. g., with a caravan) you may pass (Genesis Rabbah 74:16).