Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates from the Prophet (peace and blessings be upon him) concerning the one who comes to his wife while she is menstruating that he (peace and blessings be upon him) said: "If the blood is fresh (red), he should give one dinar in charity, and if it is in the yellowness, then half a dinar."
Hisham al-Dastuwa'i narrated it from Abd al-Karim as mawquf.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحيض / 1524