Surah At-Takathur, ayah 5

102:5

كَلَّا لَوۡ تَعۡلَمُونَ عِلۡمَ ٱلۡيَقِينِ ٥

Kallā law ta'lamūna 'ilmal-yaqīn

No! If you only knew with knowledge of certainty...1981

Footnotes

1981 The conclusion of this verse is estimated to be "...you would not have been distracted from preparing for the Hereafter."