פירוש על עבודה זרה 50:8

If the idolater asks the Jew where he is going, he should tell him he is going further than he actually is. This way the idolater will think he has more time to kill him, and the Jew will be able to make a quick getaway. This is what Jacob did when travelling with Jacob—he told him he was going to Seir, but he got off the road at Succoth, which was earlier.