Narrated ‘Anas bin Malik raziallahu anhu:
Allah’s Messenger (sallallahu alaihi wa sallam) said,
” Every nation has an extremely trustworthy man, and the trustworthy man of this (i.e. Muslim) nation is Abu ‘Ubaida bin Al-Jarrah.”
Source
Sahih al-Bukhari, Companions of the Prophet Book 62, Hadith 91