Narrator:Hudhayfah
وَعَن حُذَيْفَة قَالَ: جَاءَ أَهْلُ نَجْرَانَ إِلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالُوا: يَا رَسُولَ اللَّهِ ابْعَثْ إِلَيْنَا رَجُلًا أَمِينًا. فَقَالَ: «لَأَبْعَثَنَّ إِلَيْكُمْ رَجُلًا أَمِينًا حَقَّ أَمِينٍ» فَاسْتَشْرَفَ لَهَا الناسُ قَالَ: فَبعث أَبَا عبيدةَ بن الْجراح. مُتَّفق عَلَيْهِ
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. *i.e., the Prophet's companions. (Bukhari and Muslim.)
Reported by Al-Bukhari (No. 4380, 4381, 7254), Muslim (No. 2420a, 2420b), At-Tirmidhi (No. 3796), Ibn Majah (No. 135) and Ahmad (No. 22185, 22288, 22307). Cited in Mishkat al-Masabih (No. 6132).