كَلَّا لَوۡ تَعۡلَمُونَ عِلۡمَ ٱلۡيَقِينِ

Kalla law ta'lamoona 'ilmal yaqeen

Nay, were ye to know with certainty of mind, (ye would beware!)

— At-Takathur (ٱلتَّكَاثُر), 102:5