Abu ʿUbayda, whose name was ʿAmir ibn ʿAbd Allah ibn al-Jarrah, is one of the ten Companions promised Paradise; the Prophet ﷺ said: “Every community has its trustworthy man, and the trustworthy man of this community is Abu ʿUbayda ibn al-Jarrah” (al-Bukhari 4382). ʿAmir ibn Fuhayra, a freedman of Abu Bakr, accompanied the Hijra and died a martyr at Biʾr Maʿuna (al-Bukhari 4093).
ʿAmir is the active participle of ʿamara, “to inhabit, to populate, to make prosperous” (root ʿ-m-r): it means one who builds up and brings life to a land, and also describes what is inhabited and flourishing (bayt ʿamir, “a house full of life”). The same root gives ʿumr, “life”, as well as ʿUmar, ʿAmr and ʿAmmar. It should not be confused with Amir (أمير), “prince, commander”, from another root; it is often spelled Aamir in English to mark the difference.
The mosques of Allāh are only to be maintained by those who believe in Allāh and the Last Day and establish prayer and give zakāh and do not fear except Allāh, for it is expected that those will be of the [rightly] guided.
And to Thamūd [We sent] their brother Ṣāliḥ. He said, "O my people, worship Allāh; you have no deity other than Him. He has produced you from the earth and settled you in it, so ask forgiveness of Him and then repent to Him. Indeed, my Lord is near and responsive."