(50) باب لاَ يَتَنَاجَى اثْنَانِ دُونَ الثَّالِثِ
It was narrated that Ibn 'Umar said:
"The Messenger of Allah(ﷺ) forbade two to converse (privately) to the exclusion of a third." (ID)
Reference (ID): Sunan Ibn Majah 3776 (ID)
In-book reference (ID): Book 33, Hadith 121 (ID)
English translation (ID): Vol. 5, Book 33, Hadith 3776 (ID)