Nahj al-Balāgha
Hadith 733فَاحْذَروُا، عِبَادَاللهِ، حَذَرَ الْغَالِبِ لِنَفْسِهِ، الْمَانِعِ لِشَهْوَتِهِ، النَّاظِرِ بِعَقْلِهِ؛ فَإنَّ الاْمْرَ وَاضِحٌ، وَالْعَلَمَ قَائِمٌ، وَالطَّرِيقَ جَدَدٌ، وَالسَّبِيلَ قَصْدٌ.
Therefore, fear O creature of Allāh, like the fear of one who has control over himself, who can check his passions and perceive with his wisdom. Surely, the matter is quite clear, the banner is standing, the course is level and the way is straight.