Umayr ibn Sa'd al-Ansari was a companion of Muhammad. His father died when Umayr was young, leaving him and his mother poor and destitute. His mother eventually remarried to one of the richest men in Medina, Julas ibn Suwayd from the powerful tribe of al-Aws. When he was barely ten years old, Umayr became a Muslim and was known to frequent the mosque despite his young age. In 630 Muhammad announced his intention to lead an expedition to Tabuk against the Byzantine forces. He ordered the Muslims to make the necessary preparations.