Bhagat Sadhna was a north Indian poet, saint, mystic and one of the devotees whose hymn was incorporated in Guru Granth Sahib. He was born in 1180 AD in Hyderabad to a Muslim family. His ancestors were butchers by profession and he continued in this line slaughtering goats and selling meat.
He said, ‘God put me into this dharma, who am I to argue with that? I do not kill the animals; I do not act at all.’
https://en.wikipedia.org/wiki/Bhagat_Sadhana
He was also called Sadhna Qasai.
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