وَعَنِ الْحَسَنِ بْنِ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُمَا
قَالَ: حَفِظْتُ مِنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «دَعْ مَا يَرِيبُكَ إِلَى مَا لَا يَرِيبُكَ فَإِنَّ الصِّدْقَ طُمَأْنِينَةٌ وَإِنَّ الْكَذِبَ رِيبَةٌ»
I have retained in my memory these words of God’s Messenger, “Leave what causes you doubt and turn to what does not cause you doubt. Truth is tranquility, but falsehood is doubt.” Ahmad, Tirmidhi and Nasai transmitted it, and Darimi transmitted the first part.
Mishkat al-Masabih 2659, Book 12, Business Transactions, Hadith 15. 1 min read