Does bleeding during prayer invalidate it, and is there a limit to this?

The questioner:
I was praying the 'Asr prayer, and blood came out of my hand. Does the prayer become invalid in that case? Because I heard someone say that blood is not pure.

The Shaykh:
If a large amount of blood comes out of the body, it invalidates the wudu' (ablution), and it is obligatory to wash whatever it touches on the garment or the body, because it is impure. However, if the blood is a small amount, it does not affect the wudu', but it must be washed off the garment or the body. Yes. May Allah reward you with good.

The questioner:
What is the limit of a small amount, if you would be so kind, Shaykh?

The Shaykh:
It goes back to custom, the custom of moderate people, not the obsessive or the lax. So what the moderate people consider to be a lot is considered a lot, and what they consider to be a small amount is considered a small amount.

The presenter:
May Allah reward you with good.