Hold on to what brings certainty and leave that which makes you doubt

I said to al-Ḥasan b. ʿAlī: What did you memorize from the Messenger of Allah ﷺ? He said: I memorized from him: "Leave what makes you doubt for what does not make you doubt. The truth brings tranquility while falsehood sows doubt."  

قُلْتُ لِلْحَسَنِ بْنِ عَلِيٍّ: مَا حَفِظْتَ مِنْ رَسُولِ اللَّهِ ﷺ؟ قَالَ: حَفِظْتُ مِنْ رَسُولِ اللَّهِ ﷺ: «دَعْ مَا يَرِيبُكَ إِلَى مَا لاَ يَرِيبُكَ، فَإِنَّ الصِّدْقَ طُمَأْنِينَةٌ وَإِنَّ الْكَذِبَ رِيبَةٌ۔»  

[Machine] I heard the Messenger of Allah ﷺ saying, "Leave what causes doubt for what does not cause doubt, for verily, truthfulness brings tranquility and lying brings doubt." Strongly narrated.  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ «دَعْ مَا يَرِيبُكَ إِلَى مَا لَا يَرِيبُكَ فَإِنَّ الصِّدْقَ طُمَأْنِينَةٌ وَإِنَّ الْكَذِبَ رِيبَةٌ» سنده قوي  

I said to al-Ḥasan b. ʿAlī: What did you memorize from the Messenger of Allah ﷺ? He said: I memorized from him: "Leave what makes you doubt for what does not make you doubt. The truth brings tranquility while falsehood sows doubt." (Using translation from Tirmidhī 2518)   

قُلْتُ لِلْحَسَنِ بْنِ عَلِيٍّ مَا تَذْكُرُ مِنَ النَّبِيِّ ﷺ؟ قَالَ كَانَ يَقُولُ دَعْ مَا يَرِيبُكَ إِلَى مَا لَا يَرِيبُكَ فَإِنَّ الصِّدْقَ طُمَأْنِينَةٌ وَإِنَّ الْكَذِبَ رِيبَةٌ  

"دَعْ مَا يَريبُك إِلَى مَا لَا يَريبُك؛ فإِنَّ الْخَيْرَ طُمَأنِينةٌ، وَإِنَّ الشَّرَ ريَبةٌ".  

"دَع مَا يَريبُك إِلَى مَا لَا يَريبُك فَإِنَّ الصَّدْقَ يُنْجى".  

"عَنْ أَبِي الدَّرْدَاءِ قَالَ: دع مَا يَرِيبُكَ إِلَى مَا لَا يَرِيبُكَ، فَإِنَّ الْخَيْرَ طُمَأنِيَنةٌ وَإن الشَّرَّ فِيهِ رِيبَةٌ".