Volume 9, Book 92, Number 423:
Narrated ‘Abdullah:
The Prophet said, “None is killed unjustly, but the first son of Adam will have a part of its burden.”
Sufyan said, “..a part of its blood because he was the first to establish the tradition of murdering”
Volume 9, Book 92, Number 424t:
Narrated Jabir bin ‘Abdullah As-Salami:
A bedouin gave the Pledge of allegiance for embracing Islam to Allah’s Apostle, and then he got an
attack of fever in Medina and came to Allah’s Apostle: and said, “O Allah’s Apostle! Cancel my
pledge.” Allah’s Apostle refused to do so. The bedouin came to him again and said, “Cancel my
pledge,” but he refused again, and then again, the bedouin came to him and said, “Cancel my pledge,”
and Allah’s Apostle refused. The bedouin finally went away, and Allah’s Apostle said, “Medina is like
a pair of bellows (furnace), it expels its impurities while it brightens and clears its good.’