It was narrated by Muslim (9). In another version: "If you catch it with them, then pray, and do not say: 'I have already prayed, so I will not pray.'" It was narrated by al-Nasa'i (11). These hadiths, in their general application, point to the issue under dispute. The hadith of Yazid ibn al-Aswad is explicit regarding the repetition of the Fajr prayer, and the 'Asr prayer is similar to it. The hadiths in their unrestricted sense indicate the repetition, regardless of whether it is with the imam of the neighborhood or someone else, and regardless of whether he prayed alone or in a congregation. It was narrated from Anas that he said: Abu Musa led us in the morning prayer in al-Mirbad, then we arrived at the congregational mosque, and the prayer was established, so we prayed with al-Mughirah ibn Shu'bah. From Silah (12), on the authority of (13) Hudhayfah, that he repeated the Dhuhr, 'Asr, and Maghrib prayers, and he had already prayed them in a congregation. Both were narrated by al-Athram.

Section: If he repeats the Maghrib prayer, he should make it even by adding a fourth rak'ah. Ahmad explicitly stated this. This was also the opinion of al-Aswad ibn Yazid, al-Zuhri, al-Shafi'i, and Ishaq, and it was narrated by Qatadah from Sa'id ibn al-Musayyib. Silah narrated from Hudhayfah that when he repeated the Maghrib prayer, he said: "I began to rise for the third, but he made me sit." This could imply he was ordered to limit it to two rak'ahs so that it remains an even number, or it could imply he was ordered to pray it like the prayer of the imam. Our position is that this prayer is supererogatory (nafilah), and it is not legislated to perform a nafilah with an odd number (witr) other than the Witr prayer itself. Therefore, adding a rak'ah is preferable to decreasing it, so that he does not break away from his imam before the completion of the imam's prayer.

Section: If the prayer is established while he is outside the mosque, if it is during a prohibited time, it is not recommended for him to enter, and if it is during a non-prohibited time, it is recommended for him to enter and pray with them. If he enters and prays with them, there is no harm in it, because of the report of Abu Musa that we mentioned. However, it is not recommended, due to what Mujahid narrated, saying: I went out with Ibn Umar from the house of Abdullah ibn Khalid ibn Asid, and when he looked at the door of the mosque, the people were in prayer. He remained standing until the people finished praying, and he said: "I have already prayed at home."