Nafi' heard from Sayyiduna Abdullah bin Umar (may Allah be pleased with them), that he used to supplicate on Safa: O Lord! You have said, "Supplicate and I will accept," and You do not break Your promise. I ask You, just as You have guided me to the path of Islam, so do not separate me from Islam until I die, so that I may die as a Muslim.
Hadith Referenceموطا امام مالك رواية يحييٰ / كتاب الحج / 828