If you're unable to find the lyrics online, you can try watching the drama "Hamsar Hayat" on YouTube or other streaming platforms, which may have the song with Urdu subtitles.
तू है माँ तू है माँ ओ माँ ओ माँ ओ माँ किसी की रब्बा मा न मारे kisi ki rabba maa na mare lyrics by hamsar hayat link