Al-quran

تتجافا جنوبهم عن المضاجع يدعون ربهم خوفا و طمعا ومما رزقنهم ينفقون(١٦)فلا تعلم نفس ما اخفي لهم من قرة اعيں جزاء بماكانوا يعملون(١٧)

Translation: Their side is separate from the beds, they call upon their Lord with fear and hope, and spend from what I have given them. No one knows what the hidden object is hidden for them. This is a reward for their righteous deeds. -Sura Sajda, (32): 16-17