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Amir al -Mu’minin Ali (as) said:
إنَّ أهنَأ النّاسِ عَيشا مَن كَسَمَ اللّهُ لَهُ رضِيا.
The calm and guardian has the most happy life to be pleased with what God has forgiven for him.
Hadith Hadith
islamquotes.org
NOTE: Translated with Google Translate