Nahj al-Balāgha

Hadith 2183
chastityadultery
٣٠٥. وَقَالَ (عليه ‏السلام): مَا زَنَى غَيُورٌ قَطُّ.
305. Amīr al-mu’minīn, peace be upon him, said: A self respecting man never commits adultery.
Source: al-Sharīf al-Raḍī