The Prophet (ﷺ) said to the people of Nijran, "I will send you the most trustworthy man." (Every one of) the companions of the Prophet (ﷺ) was looking forward (to be that person). He then sent Abu 'Ubaida.
Sahih al-Bukhari Book 62, Hadith 90
← Previous Hadith Allah's Messenger (ﷺ) said, " Every nation has an extremely trustworthy man, and the trustworthy man of this (i.e. Muslim) nation is Abu 'Ubaida bin Al-Jarrah."

Sahih al-Bukhari Book 62, Hadith 89 Next Hadith → I heard the Prophet (ﷺ) talking at the pulpit while Al-Hasan was sitting beside him, and he (i.e. the Prophet ) was once looking at the people and at another time Al-Hasan, and saying, "This son of mine is a Saiyid (i.e. chief) and perhaps Allah will bring about an agreement between two sects of the Muslims through him."

Sahih al-Bukhari Book 62, Hadith 91