Muhammad Siddique ناز خیالوی (12 December 1947 – 12 December 2010), pen name Naz Khialvi, was a Pakistani lyricist and radio broadcaster, who is mainly known for his Sufi verse Tum Ek Gorakh Dhanda Ho (You are a Puzzle), later sung by Nusrat Fateh Ali Khan, a legendary Qawwali singer, making both of them a household name.

[1] Muhammad Siddique, pen name Naz Khialvi, born in Jhok Khyal Chak No 394GB, near Killianwala, Tandlianwala, district of Faisalabad, 174 km from Lahore, in Province of Punjab, Pakistan.

[1] He also wrote lyrics in Urdu and Punjabi.

[2] Naaz Khialvi lived many years with famous Urdu poet Ehsan Danish.

Khialvi's first Book "SaaiaN Way", comprising Punjabi "kaafi", was published by Misaal Publishers, Faisalabad in 2009; and his second book "Lahu kay Phool" which was later changed to "Tum Ik Gorakh Dhanda Ho", comprising Urdu ghazals, was still under compilation.