Sahih Muslim
2419.01

Anas reported Allah's Messenger (ﷺ) as saying:For every Umma there is a man of trust and the man of trust of this Umma is Abu 'Ubaida b. Jarrah

2419.02

Anas reported that the people of Yemen came to Allah's Messenger (ﷺ) and said:Send with us a person who should teach us Sunnah and al-Islam, whereupon he (the Holy Prophet) caught hold of the hand of Ubaida and said: He is a man of trust of this Umma