When Muhammad and Abu Bakr proceeded to migrate from Mecca in 622, known as the
Hijrah, Amir grazed Abu Bakr's flocks by day, then brought them in the evening to the cave where Abu Bakr and Muhammad were hiding, He was the one to write the note to Surraqah bin Mallik that no harm would come to them from the Prophet's side. At first Amir stayed with Saad ibn Khaythama in Medina; but he later returned to Abu Bakr's house. Muhammad made a pact of brotherhood between Amir and Al-Harith ibn Aws ibn Muadh. Soon after their arrival, Amir, Abu Bakr and
Bilal were all struck by Medina fever. When the young
Aisha came to inquire after their health, Amir replied, apparently rambling:
I have experienced death before actually tasting it: The coward’s death comes upon him as he sits. Every man resists it with all his might like the ox who protects his body with his horns. Amir fought at the battles of
Badr and
Uhud. ==Death==