On the authority of Abu Muhammad al-Hasan ibn Ali ibn Abee Talib (may Allah be pleased with him), the grandson of the Messenger of Allah ﷺ, and the one much loved by him, who said:

I memorised from the Messenger of Allah ﷺ: “Leave that which makes you doubt for that which does not make you doubt.”

[At-Tirmidhi]
[An-Nasai]
At-Tirmidhi said that it was a good and sound (hasan saheeh) hadeeth.

عَنْ أَبِي مُحَمَّدٍ الْحَسَنِ بْنِ عَلِيِّ بْنِ أَبِي طَالِبٍ سِبْطِ رَسُولِ اللَّهِ ﷺ وَرَيْحَانَتِهِ رَضِيَ اللَّهُ عَنْهُمَا، قَالَ: حَفِظْت مِنْ رَسُولِ اللَّهِ ﷺ "دَعْ مَا يُرِيبُك إلَى مَا لَا يُرِيبُك".
رَوَاهُ التِّرْمِذِيُّ [رقم:2520]،[وَالنَّسَائِيّ]
وَقَالَ التِّرْمِذِيُّ: حَدِيثٌ حَسَنٌ صَحِيحٌ.