This passionate prayer for peace is attributed to a Palestinian source in several Global Song collections. Music can be found in Singing in Community.
While the pronunciation of Arabic can differ from country to country, here is a recording of the song in the original language to guide you.
A translation of the text is:
Yarabba ssalami amter alayna ssalam,
Yarabba ssalami im la’ qulubana ssalam.
God of Peace, rain peace upon us,
fill our hearts with peace.