Ma'arif al-Qur'an
Mufti Muhammad ShafiCommentaryالْفُرْقَانَ وَضِيَاءً وَذِكْرًا لِّلْمُتَّقِينَ (Criterion and light and an advice for the God-fearing - 21:48) The three attributes which belong to Torah are فُرْقَانَ (criterion) which differentiates between right and wrong second is 4 ' (light) which provides light and manifestation of truth to hearts, and the third is ذِکر (advice) which is a source of guidance for the people. Some explain فُرْقَانَ as help from God which was available to Sayyidna Musa (علیہ السلام) all times. It was manifest when he was raised in the Pharaoh's house, then at the time of his contest with the Egyptian magicians which resulted in the Pharaoh's discomfiture, and again when he was pursued by the Pharaoh and his army and Allah saved him by causing dry passageways to appear in the river and, after the Bani Isra'il had crossed over to the other side, by drowning the Pharaoh and his army. Even after this incident Allah's help was available to him at all times.
Qurtubi has pointed out that whereas (ضِيَاءً light) and ذِکر (advice) are the attributes of Torah, o4 (criterion) is something else and not an attribute of Torah, because of the use of the conjunctive letter Wa.'o (و) after the word فُرْقَانَ (Allah knows best).