Selections from The Sayings and Preaching of Amir al-Muminin Ali ibn Abi Talib (Peace Be Upon Him) Including His Replies to Questions and Maxims Expressed for Various Purposes.Translated by Sayyid Ali Reza
وَقَالَ (عليه السلام):
Amir al-mu'minin, peace be upon him, said:
غَيْرَةُ الْمَرْأَةِ كُفْرٌ
The jealousy of a woman (with co-wives) is heresy,
وَ غَيْرَةُ الرَّجُلِ إِيمَانٌ .
while the jealousy of a man is a part of belief.