Who is the reciter mentioned in Sahih al-Bukhari whom the angels raised to heaven after his death?

Amir ibn Fuhayrah is the Companion who was raised to the heavens after his martyrdom on the day of Bi'r Ma'unah. Al-Tufayl ibn Amir saw him elevated between the heaven and the earth. He informed the Prophet, may Allah's prayers and peace be upon him, that his Companions who were afflicted on that day asked their Lord to inform their brothers of the رضا (pleasure/satisfaction) they had attained from Allah.