Musannaf Ibn Abi Shaybah

Ibrahim used to say that whatever comes out of a wound is like blood; it breaks wudu.

Hazrat Zuhri says that pus and blood have the same ruling.

Hasan says that there is no ablution (wudu) due to pus and impure blood.

Hazrat Abu Majliz did not consider peep (the game of dice) to be anything and used to say that Allah Almighty has only mentioned blood.

Hazrat Hakam and Hazrat Hammad used to say that whatever comes out of a boil is is in the category of blood.