[1] Sadiq was born in 1939 in a Punjabi Muslim family, to father Walayat Ali and mother Parsinni, in the village of Kup Kalan (now malerkotla district) in British Punjab.

He first sang the famous folk song "Nigah Maarda Aayin Ve Mera Laung Gawacha" as duet with Bibi Surinder Kaur in late 60s written by lyricist Babu Singh Maan.

Many of Punjabi singers have re-recorded his songs such as Na De Dil Pardesi Nu, Lammi Seeti Maar Mittra, Mera Laung Gawacha and Boliyaan.

He contested from Bhadaur constituency in 2012 assembly elections as candidate of Congress and won defeating Darbara Singh Guru of Shiromani Akali Dal.

His election was challenged by the defeated Akali candidate Guru on the grounds that he is a Muslim and thus does not belong to a scheduled caste making him ineligible to contest from a reserved seat.