وَلَوْ أَنَّهُمْ أَقَامُوا التَّوْرَاةَ وَالْإِنجِيلَ وَمَا أُنزِلَ إِلَيْهِم مِّن رَّبِّهِمْ لَأَكَلُوا مِن فَوْقِهِمْ وَمِن تَحْتِ أَرْجُلِهِم ۚ مِّنْهُمْ أُمَّةٌ مُّقْتَصِدَةٌ ۖ وَكَثِيرٌ مِّنْهُمْ سَاءَ مَا يَعْمَلُونَ (66)
(5:66) Had the People of the Book observed the Torah and the Gospel, and all that had been revealed to them from their Lord, sustenance would have been showered over them from above and risen from beneath their feet. *96 Some among them certainly keep to the right path; but many of them do things which are evil.
*96) In the Old Testament, Leviticus (chapter 26) and Deuteronomy (chapter 28) record a sermon of Moses in which he impresses upon Israel, in great detail, the bounties and blessings of God with which they would be endowed if they obeyed His commandments, and the afflictions, scourges and devastations that would descend upon them if they disobeyed Him and rejected the Book of God. That sermon of Moses is the best explanation of this verse of the Qur'an.