Nahj al-Balāgha

Hadith 2148
envylovebrotherhood
٢١٨. وَقَالَ (عليه ‏السلام): حَسَدُ الصَّدِيقِ مِنْ سُقْمِ الْمَوَدَّةِ.
218. Amīr al-mu’minīn, peace be upon him, said: Jealousy by a friend means defect in his love.
Source: al-Sharīf al-Raḍī