إِنَّا سَنُلْقِى عَلَيْكَ قَوْلاً ثَقِيلاً
Verily, We shall send down to you a word Thaqeel.
Al-Hasan and Qatadah both said, “The actions with it.” `Abdur-Rahman bin Zayd bin Aslam said, “Just as it is heavy in this world, it will also be heavy on the Day of Judgement in the Scales.” {Soorah al Muzzammil Tafseer Ibn Katheer}