Found the lyrics of this song from a website, thought of sharing it:
The song is in Saraiki language and it is written by Baba Bulley Shah.
Bulley nu samjhawan aayan behna te bharjaiaan,
Munlay bullehya sada kehna chad de pala rayaan
Aaale nabi Aulade Nabi nu tu kyon leeka laayaan
Jehra sanu Syed saday doozakh milan sazayaan
Raaeen Saaeen subhni Thaeee Rab diyan be parwa yan
Sohiyaan pare hataian te kojiah lay Gul layaan
Jay tu Loray Baagh baharan Chakar ho ja raai yan
Bulley shah di zaat ke puchni Shaakar ho Raziaaan
Bandeyaaa hoooo ,Bandeya
And the story behind it is written below: (picked it up from here)
Actually bulle shah is being asked by his relatives to leave his murshid or guru whom he call as ‘raaean’ or ‘raaniya”
probably that was the caste of his mursheed or peer - hazrat shah anayat which was lower then bulle shahs own caste. every one was after his life to leave his guru.
thats why he explains through this song, who ever calls him sayed( bulle shahs caste) will be punished in hell and who ever calls him raaniya will be showerd with blessings. because for him his mursheed is everything and his caste is now his gurus and in whatever guru orders and decides for him - shakar or raziaan
apne mursheed ki raza mein razi rehna, thats what love is. jo woh khuda deta hai usi mein khush rehna.
this songs itself answers questions of people above saying how can a muslim girl marry a non muslim.
if love is pure truthfull and selfless then its becomes form of god. jab woh khuda, allah kisi caste system ko nai manta , uske liye to sab uske bacche hai to bhai tum kyon mante ho ?
khuda ka saccha aashiq sirf khuda ko manta hai aur kisi ko nai, na kisi caste system ko, na kisi majhab ko.
khuda se saccha ishq karo, ishq hi khuda hai.
*End of explanation*
I loved the film 'Khuda Kay Liye' -- and this song is my current favorite!