Messenger of Allah, send along with us a man of trust; whereupon he said: I would definitely send to you a man of trust, a man of trust in the true sense of the term. Thereupon his Companions looked up eagerly and he sent Abu Ubaida b. Jarrah. (Using translation from Muslim 2420a)
أَنَّهُ قَالَ جَاءَ أَهْلُ نَجْرَانَ إِلَى رَسُولِ اللهِ ﷺ فَقَالُوا ابْعَثُوا إِلَيْنَا رَجُلًا أَمِينًا فَقَالَ لَأَبْعَثَنَّ إِلَيْكُمْ رَجُلًا أَمِينًا حَقَّ أَمِينٍ حَقَّ أَمِينٍ قَالَ فَاسْتَشْرَفَ لَهَا النَّاسُ قَالَ فَبَعَثَ أَبَا عُبَيْدةَ بْنَ الْجَرَّاحِ