When Moses perceived the Heaven and Earth, Sun and Moon, Stars and Planets, Mountains and Rivers turned a deaf ear to his prayers, he tried to implore mankind to intercede for him before God. He went first to his disciple Joshua, saying: "O my son, be mindful of the love with which I treated thee by day and by night, teaching thee mishnah and halakah, and all arts and sciences, and implore now for my sake God's mercy, for perhaps through thee He may take pity upon me, and permit me to enter the land of Israel."
Joshua began to weep bitterly, and beat his palms in sorrow, but when he wanted to begin to pray, Samael appeared and stopped his mouth, saying, "Why dost thou seek to oppose the command of God, who is 'the Rock, whose work is perfect, and all whose ways are judgement?'" Joshua then went to Moses and said, "Master, Samael will not let me pray." At these words Moses burst into loud sobs, and Joshua, too, wept bitterly.