If fasting the white days coincides with the days of Tashreeq, is it permissible to fast them?

Question: If fasting the white days coincides with the days of Tashreeq, is fasting permissible or not?

Answer: It is not permissible to fast on the thirteenth of Dhu al-Hijjah, whether voluntarily or as an obligation; because these are days of eating, drinking, and remembrance of Allah (Glorified and Exalted is He) . The Prophet (peace and blessings be upon him) prohibited fasting on them and did not grant a dispensation for it to anyone, except for one who does not find the sacrificial animal for Tamattu'. In that case, he may fast the three days of Tashreeq in place of the sacrificial animal, and fast the remaining seven days with his family. This is based on what is established in Sahih al-Bukhari (may Allah have mercy on him) from Aisha and Ibn Umar (may Allah be pleased with them both), who said: As for fasting on the fourteenth and fifteenth, there is no harm in it; because they are not among the days of Tashreeq. And success is from Allah.