Hudhaifa told that the people of Najran came to God's messenger and said, "Messenger of God, send us a trustworthy man." When he replied, "I shall certainly send you a trustworthy man who is genuinely trustworthy," the people were looking to see if they would be appointed. He then sent Abu `Ubaida b. al-Jarrah. (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب المناقب / 6132
Hadith Gradingالألبانی:مُتَّفق عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (3745) و مسلم (55/ 2420)»