According to Sikhan di Bhagat Mala, MTan Jamal formally embraced the Sikh faith and received spiritual instruction from Guru Hargobind. Bhai Kahn Singh, Gurushabad Ratndkar Mahdn Kosh, mentions one Jamal, a fakir of Lahore and a brother of one Kamal, a KashmTri Muslim of spiritual attainments, who remained in attendance upon Guru Hargobind at Kiratpur. Probably this Jamal is the same MTari Jamal. He died in AD 1650.
References :
1. Mani Singh, Bhai, Sikhan di Bhagat Mala. Amritsar, 1955
2. Santokh Singh, Bhai, Sri Gur Pratdp Suraj Granth. Amritsar, 1927-33
3. Kahn Singh, Bhai, Gurushabad Ratndkar Mahdn Kosh. Patiala, 1974