Answer:
(Fatwa: 2175/1257/H=1432)
It is sunnah to do musafaha with both the hands and it is also allowable to do it with one hand. Musafaha causes love and amity and it removes sins. It is proved by hadith.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
