4. Consequently, man must be careful that, at the time when he raises his hands upwards, they are raised in prayer, in blessing, or in entreaty. And he must not raise his hands idly, since those ten potentates are ready and are roused towards the spreading of the hands, and if it is in vain, these ten will curse it with two hundred and forty-eight curses. This is what is written, "For he loved cursing, and it came to him" (Tehilim 109:17).