Kuraib narrates: Abdullah bin Abbas (may Allah be pleased with them both) and some other companions of the Prophet (may Allah be pleased with them) sent me to the noble wife of the Prophet (peace be upon him), Umm Salamah (may Allah be pleased with her), so that I could ask her on which days the Prophet (peace be upon him) used to fast the most. Umm Salamah (may Allah be pleased with her) replied: On Saturday and Sunday. I returned to them and informed them about this, but they did not accept my statement. They thought perhaps I had not remembered the matter correctly. They sent me again, and Umm Salamah (may Allah be pleased with her) gave the same answer. I came and informed them, so all of them themselves got up and (presented themselves before Umm Salamah, may Allah be pleased with her). They said: We had sent this person to you regarding this issue, and he has reported that you gave this answer. Umm Salamah (may Allah be pleased with her) said: He has spoken the truth; the Prophet (peace be upon him) used to fast most often on Saturday and Sunday. He used to say: These two are the festival days of the polytheists (they eat and drink on these days), so I wish to act contrary to them.