He, Allah’s blessings be upon him and his Family, also forbade that a man performs tadbeeh in prayer like how a donkey performs tadbeeh. Its meaning is that a man lowers his head during kneeling until it becomes lower than (the level of) his back. When he, Allah’s blessings be upon him and his Family, used to kneel, he did not make upright his head nor raise, but it was between that. Raising is to ascend the head and make it in an upright position. Allah, Exalted is He, said: «Racing ahead, their heads raised up» (14:43). What is recommended of this is that a man’s back and hand are leveled during kneeling, because the Messenger of Allah, Allah’s blessings be upon him and his Family, if water was poured on his back while he was kneeling, he would have remained firm. Al-Sadiq, peace be upon him, said: «There is no prayer (that is accepted) for the one who does not make firm his spine during his kneeling and prostration.»