The Oaths of Allah: The one who purifies himself will be successful

وَالشَّمْسِ وَضُحَاهَا
By the sun and its brightness (91:1)
وَالْقَمَرِ إِذَا تَلَاهَا
And [by] the moon when it follows it (91:2)
وَالنَّهَارِ إِذَا جَلَّاهَا
And [by] the day when it displays it (91:3)
وَاللَّيْلِ إِذَا يَغْشَاهَا
And [by] the night when it covers it (91:4)
وَالسَّمَاءِ وَمَا بَنَاهَا
And [by] the sky and He who constructed it (91:5)
وَالْأَرْضِ وَمَا طَحَاهَا
And [by] the earth and He who spread it (91:6)
وَنَفْسٍ وَمَا سَوَّاهَا
And [by] the soul and He who proportioned it (91:7)
فَأَلْهَمَهَا فُجُورَهَا وَتَقْوَاهَا
And inspired it [with discernment of] its wickedness and its righteousness (91:8)
قَدْ أَفْلَحَ مَن زَكَّاهَا
He has succeeded who purifies it (91:9)
وَقَدْ خَابَ مَن دَسَّاهَا
And he has failed who instills it [with corruption]. (91:10)