"And indeed he fails who buries it," meaning: he whose soul Allah has buried, meaning: He has made him wretched.
Muhammad said: "dassaha" (he buried it), the origin of the word is (dassaha), and one of the two Sīn letters was converted into a Yāʾ. The meaning is: He made it small and base.
﴿وَقد خَابَ من دساها﴾ أَيْ: مَنْ دَسَّى اللَّهُ نَفْسَهُ، أَيْ: أَشْقَاهَا.
قَالَ مُحَمَّدٌ: ﴿دَسَّاهَا﴾ أَصْلُ الْكَلِمَةِ (دَسَّسَهَا) فَقُلِبَتِ السِّينُ الْوَاحِدَةُ يَاءً، الْمَعْنَى: جَعَلَهَا قَلِيلَةً خَسِيسَةً.
