I would like to know
whether bleeding invalidates one’s prayer

Praise be to Allaah.

We know of no evidence (daleel) to indicate
that bleeding from any part of the body other than the vagina invalidates one’s
wudoo’. The basic principle is that it does not break wudoo’. Acts
of worship should be based on sound reports, so no one is permitted to say that
any act of worship is prescribed by Islam unless he has evidence. Some scholars
suggested that wudoo’ is broken if the amount of blood lost from any place
other than the vagina is considered to be excessive. If a person in this condition
does wudoo’ in order to be on the safe side, then this is good, because
the Prophet (peace and blessings of Allaah be upon
him) said: “Leave that which makes you doubt for that which does not make
you doubt.” (Reported by al-Nisaa’i, 8/328; al-Tirmidhi, 7/221
Tuhfat al-Ahwadhi; al-Haakim, 2/13, 4/99). See also Question
#2570. And Allaah knows best.