Midrash su Genesi 44:29

And God said unto Jacob: “Arise, go up to Beth-El” (Gen. 35:1). May our master teach us: How many times is a man’s “account book”⁷The heavenly ledger wherein man’s deeds are recorded. open? Thus did our masters teach us: A man’s account book is opened three times: when he journeys alone upon a highway; when he resides in a dilapidated house; when he vows and fails to fulfill. R. Aha the son of Jacob deduced the first statement from the biblical verse If harm befall him by the way (Gen. 42:3). R. Eliezer the son of R. Yosé the Galilean stated: If you should discover that a righteous man is setting out on a journey, leave even three days earlier or three days later in order to travel with him. But if you should see a wicked man setting out on a journey, leave three days earlier or three days later in order not to go with him, as it is said: Set thou a wicked man over him; and let an adversary stand at his right hand (Ps. 109:6). A righteous man, however, is accompanied by angels of peace, as it is said: For He will give his angels charge over thee (ibid. 91:11).