hadith
10989
۞
Imam Ali (AS) said, The root of indifference towards worldly pleasures is certitude, and its fruit is felicity.
الإمامُ عليٌّ (عَلَيهِ الّسَلامُ) : أصْلُ الزُّهْدِ اَلْيَقينُ وَ ثَمَرَتُهُ السَّعادَةُ