“Nothing would wake him up except the adhaan/call to prayer, if he is still alive.”

`Umar (radi Allahu 'anhu) became unconscious after he was stabbed, and
according to Al Miswar bin Makhramah, it was said: "Nothing would wake
him up except the adhaan/call to prayer, if he is still alive."
They said to him, "The prayer has finished, O Chief of the Faithful!"
He woke up and said, "The prayer, by Allah! Verily, there is no share
in Islam for whoever abandons the prayer."
He performed the prayer while his wound was bleeding.
Source: Sifat as Safwah 2/131/--
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