1.It is said that `Amr b. `Ambasa was fourth or fifth in Islam. Abu Nu`aym has reported that he had given up idol-worship before Islam. He died during the caliphate of `Uthman. (Ikmal al-Mu`lim bi Fawaa’id Muslim)
2. The Prophet mentioned a free person (Abu Bakr) and a slave (Bilal) not mentioning `Ali ibn abi Talib because he was hardly seven years old, nor Khadijah because he knew that `Amr was interested in men alone. (Al-Kawkab al-Wahhaj, Sharh Sahih Muslim)
3. He meant to say that he would (embrace Islam) and stay with him in Makkah. (Al-Kawkab al-Wahhaj, Sharh Sahih Muslim)
4. That is, ‘You can see my condition that I am forced to conceal myself from the Quraysh.
5. Qadi `Iyad has commented that when the Prophet said to `Amr b. Anbasa that he might presently return to his people, to come back when he, the Prophet, had overcome resistance, when he could come and join him – when he said that – he was not allowing him to remain on the old religion. He advised him to stay away from him in that phase when Islam was weak. He told him that there was but one free man and another, a slave, who were all of his followers. He feared that if `Amr had stayed, the Quraysh would torture, or even kill him. (Ikmal al-Mu`lim bi Fawaa’id Muslim)
`Amr b. `Ambasa reported about himelf: “I went back to my tribe (Banu Ghifar) and kept inquiring about the Prophet to ultimately learn that he had migrated to Madinah. I asked the people about how he fared at Madinah. They said people were hastening up to him while his own people had attempted to assassinate him but had failed. So, I went to Madinah, met him and asked him, ‘Messenger of Allah. Do you remember me?’ He replied, ‘I do. You are the man who had met me in Makkah.’ I said, ‘Sure.’” (Fath al-Mun`im Sharh Sahih Muslim)
This gives us some idea of the Prophet’s memory. He hadn’t forgotten a man he had met in Makkah, after a life and death struggle lasting some fifteen torturous years. And memory is linked to attachment, care and love. But what was there in `Amr b. `Ambasa that he won a place in memory? The inference is obvious. The message he had been endowed with, placed the central role in his life, emotions, and passions. That’s where `Amr b. `Ambasa found his passage into the Prophet’s memory. (Au.)
`Amr b. `Ambasa had returned to the Prophet after the Khaybar battle of the 5th year after Hijrah. (Al-Kawkab al-Wahhaj, Sharh Sahih Muslim, and others)