He asked the Prophet ﷺ, "Should I fast on Friday and not speak to anyone on that day?"The Prophet ﷺ replied, "Do not fast on Friday alone, unless it falls within days of which it is one, or within a month of fasting. As for not speaking to anyone, by my life, for you to speak what is good and forbid what is wrong is better than for you to remain silent."
أنه سأل النبي ﷺ: أصوم يوم الجمعة، ولا أكلم ذلك اليوم أحدا؟ فقال النبي ﷺ: لا تصم يوم الجمعة إلا في أيام هو أحدها، أو في شهر. وأما أن لا تكلم أحدا، فلعمري لأن تكلم بمعروف، وتنهي عن منكر خير من أن تسكت.
Imam Ahmad (21954), Tabarani in Al-Kabir (31/2), Abd bin Humayd (428), and Bayhaqi (10/75–76) all narrated it through the route of Ubaydullah bin Iyad bin Laqeet, who said, I heard Iyad bin Laqeet say, I heard Layla, the wife of Bashir, say, "Bashir told me," and he related it. Its chain of transmission is sahih. The wife of Bashir was a female companion whose name was Juhaydama, and the Messenger of Allah renamed her Layla. A hadith of hers regarding the prohibition of fasting continuously without breaking the fast has already been mentioned.On this subject there is also what was narrated from Abdullah bin Abbas, who said, the Messenger of Allah said, "Do not fast on Friday alone." Ahmad (2615) narrated it from Itaab bin Ziyad, who said, Abdullah told us, who said, Husayn bin Abdullah bin Ubaydullah bin Abbas told us, from Ikrima, from Ibn Abbas, and he related it. Husayn bin Abdullah bin Ubaydullah bin Abbas is daif by unanimous agreement of the scholars.It was narrated from Abu Darda, who said, the Messenger of Allah said, "O Abu Darda, do not single out the night of Friday for standing in prayer apart from other nights, nor the day of Friday for fasting apart from other days." Ahmad (27507), Nasai in Al-Kubra (2752), and Ibn Abu Shayba (3/45) all narrated it from the hadith of Aasim Ahwal, from Muhammad bin Sirin, from Abu Darda, and he related it. However, Muhammad bin Sirin never heard directly from Abu Darda, because he was born two years before the end of the caliphate of Uthman, and Abu Darda died toward the end of Uthman's caliphate. Moreover, he lived in Basra while Abu Darda lived in Syria, as Abu Hatim stated.The majority of the scholars relied on these hadiths to hold that singling out Friday for fasting is disliked. Malik, however, said it is not disliked. In Muwatta, in the chapter comprehensively covering fasting, Yahya said, I heard Malik say, "I have not heard any of the people of knowledge and jurisprudence, nor anyone whose example is followed, prohibit fasting on Friday. Fasting on it is good. I have seen some scholars fast on that day, and I think he used to deliberately choose it."Hafiz bin Qayyim, in Tahzib Sunan, quoted Daudi as saying, "This hadith did not reach Malik, and had it reached him, he would not have opposed it."I say, in this there is a refutation of the claim that the practice of the people of Madinah constitutes proof, because sunnahs could remain hidden from them just as they could remain hidden from others. This is because a number of the companions, after the Prophet, left Madinah for other lands for the sake of jihad, calling people to Islam, teaching, trade, and other purposes.