28الَّذينَ آمَنوا وَتَطمَئِنُّ قُلوبُهُم بِذِكرِ اللَّهِ ۗ أَلا بِذِكرِ اللَّهِ تَطمَئِنُّ القُلوبُMuhammad QadriAllah eases and restricts the sustenance for whomever He wills; and the disbelievers rejoiced upon the life of this world; and the life of this world, as compared with the Hereafter, is just a brief utilisation.