Al-Muzzammil - 73:5

إِنَّا سَنُلْقِي عَلَيْكَ قَوْلًا ثَقِيلًا
[73:5]
Surely We will make to light upon you a weighty Word.
Soon shall We send down to thee a weighty Message.
For we shall charge thee with a word of weight.