[Pooya/Ali Commentary 19:53] In verse 25 to 35 of Ta Ha prophet Musa prayed to Allah to appoint for him a successor (wazir) from his family, his brother Harun, so as to strengthen by him his back; and associate him in his affairs so that they might glorify Allah much and often. In verse 36 Musa's prayer is granted by Allah. On several occasions the Holy Prophet had said that Ali was to him as Harun was to Musa. See commentary of al Baqarah : 51. He actually prayed to Allah for appointment of Ali as his wazir (successor) as Musa prayed for Harun. See commentary of Ma-idah: 67. Allah granted his prayer also. See commentary of Ali Imran: 52 and 53 and Ma-idah: 67. Aqa Mahdi Puya says: In the state of ascension (refer to verse 52) Allah informed Musa that his prayer (Ta Ha: 25 to 36) had been accepted (Taha: 36), and Harun was made a prophet. Likewise Ali was appointed as the successor of the Holy Prophet at the time of his ascension (see commentary of Bani Israil: 1). Ali was not a prophet because prophethood terminated in the Holy Prophet as the religion of Allah was completed on the day of Ghadir when the Holy Prophet, under the command of Allah, established the wilayah and imamah of Ali ibn abi Talib, so there was no need of any prophet after the Holy Prophet (see commentary of Fatihah: 7). Therefore Ali was an Imam (see commentary of al Baqarah: 124).