(1) بَابُ مَا جَاءَ فِي إِجَازَةِ خَبَرِ الْوَاحِدِ الصَّدُوقِ فِي الأَذَانِ وَالصَّلاَةِ وَالصَّوْمِ وَالْفَرَائِضِ وَالأَحْكَامِ
Narrated Anas:
The Prophet (ﷺ) said, "For every nation there is an Amin (honest, trustworthy person) and the Amin of this nation is Abu 'Ubaida."
Reference: Sahih al-Bukhari 7255
In-book reference: Book 95, Hadith 10
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 91, Hadith 361