Strive to do your best in whatever you do

This hadith is about the importance of honesty and trustworthiness. The people of Najran asked the Prophet Muhammad ﷺ to send them an honest man who was trustworthy, so he sent Abu Ubaida bin Al-Jarrah. This shows that honesty and trustworthiness are important values in Islam, as they were highly valued by the Prophet himself. It also shows that even though many people wanted to be chosen for this task, it was ultimately up to Allah's will who would be chosen for it. This teaches us that we should always strive to do our best in whatever we do, but ultimately leave it up to Allah's will as He knows what is best for us.