Mishkat al-Masabih 23 Medicine and Spells كتاب الطب والرقى 36

وَعَن كبشةَ بنت أبي بكرةَ: أَنَّ أَبَاهَا كَانَ يُنْهِي أَهْلَهُ عَنِ الْحِجَامَةِ يَوْمَ الثُّلَاثَاءِ وَيَزْعُمُ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَنَّ يَوْمَ الثُّلَاثَاءِ يَوْمُ الدَّمِ وَفِيهِ سَاعَةٌ لَا يَرْقَأُ» . رَوَاهُ أَبُو دَاوُد

Kabsha daughter of Abu Bakra told that her father used to forbid his family to have themselves cupped on a Tuesday, and used to assert on the authority of God’s messenger that Tuesday is the day of blood in which there is an hour when it does not stop. Abu Dawud transmitted it.