וַיִּבְרַ֥ח הוּא֙ וְכָל־אֲשֶׁר־ל֔וֹ וַיָּ֖קָם וַיַּעֲבֹ֣ר אֶת־הַנָּהָ֑ר וַיָּ֥שֶׂם אֶת־פָּנָ֖יו הַ֥ר הַגִּלְעָֽד׃
Поэтому он убежал со всем, что имел; Он встал и прошел через реку, и склонил лице свое к горе Галаадской.
Sforno on Genesis
ויברח, usually the word בריחה, flight, means that someone departs without being pursued. The flight is inspired by fear of damage and harm not imminent. When the word ניסה is used to describe flight, this describes people fleeing from pursuers, out of fear from immediate damage and harm.