Sayyidina Abdullah Ibn Mas’ud (RA) narrated: During the Battle of Badr, when the captives were brought, Allah’s Messenger (SAW) said, “What do you suggest about these captives?” Then a lengthy account follows in the hadith, Allah’s Messenger (SAW) said, “None of them will go without paying ransom or having his neck severed.” So, I said, “O Messenger of Allah (SAW) , except Suhayl ibn Bayda. I had heard him remember Islam.” But, Allah’s Messenger (SAW) did not say anything. So, I did not find myself more afraid any day than on this day - that stones might fall on me from the sky that day. But, Allah’s Messenger (SAW) 44 (soon broke his silence and) said, “Except Suhyl ibn Bayda.” Then, Umar (RA) said that the Qur’an was revealed:
"It is not for a Prophet (SAW) that there remain prisoners with him until he has had a thorough blood-shed in the land." (8: 67)
[Ahmed 5902, Abu Dawud 2647]