Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates this statement of the Noble Prophet (peace and blessings be upon him): "Wudu does not become obligatory due to one drop or two drops of blood appearing, until the blood starts to flow (it does not become obligatory until then)." The narrator of this narration, Umar bin Fadl bin Utbah, is weak, and Sufyan bin Diya and Hajjaj bin Nasr are also weak.