344 – Chapter: The dislike of a congregant beginning a supererogatory prayer after the muʾadhdhin has initiated the iqāmah, whether that voluntary prayer is the regular Sunnah attached to the obligatory prayer or any other.
1768 – Abū Hurayrah (may Allah be pleased with him) reported that the Prophet ﷺ said, “When the iqāmah has been pronounced for the prayer, there is no prayer except the prescribed one.” (1) Reported by Muslim.
345 – Chapter: The dislike of singling out Friday for fasting or its preceding night for voluntary night prayer
1769 – Abū Hurayrah (may Allah be pleased with him) narrated that the Prophet ﷺ said, “Do not single out the night of Friday from the other nights for night prayer, and do not single out Friday from the other days for fasting, unless it coincides with a fast one of you habitually observes.” Reported by Muslim.
1770 – He also reported that he heard the Messenger of Allah ﷺ say, “None of you should fast on Friday unless he fasts a day before it or a day after it.” Agreed upon.
1771 – Muḥammad ibn ʿAbbād said: I asked Jābir (may Allah be pleased with him), “Did the Prophet ﷺ forbid fasting on Friday?” He replied, “Yes.” Agreed upon.
1772 – The Mother of the Believers, Juwayriyyah bint al-Ḥārith (may Allah be pleased with her), reported that the Prophet ﷺ entered upon her on a Friday while she was fasting and said, “Did you fast yesterday?” She answered, “No.” He asked, “Do you intend to fast tomorrow?” She said, “No.” He said, “Then break your fast.” Reported by al-Bukhārī.