Sahih Muslim
2420.01

Hudhaifa reported that the people of Najran came to Allah's Messenger (ﷺ) and said:Allah's Messenger, 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

2420.02

This hadith has been reported on the authority of Abu Ishaq with the same chain of transmitters