Chapter on the Rulings of Congregational Prayer (the Minimum Number for Congregational Prayer, the Description of the Imam, Who Is to Be Followed and Who Is Not to Be Followed, Recitation Behind Both of Them, the Rulings of Those Led in Prayer, and Other Such Rulings Related to It)

Tahdhīb al-Aḥkām|Volume 3|Book 1|Chapter 3

Chapter on the Rulings of Congregational Prayer (the Minimum Number for Congregational Prayer, the Description of the Imam, Who Is to Be Followed and Who Is Not to Be Followed, Recitation Behind Both of Them, the Rulings of Those Led in Prayer, and Other Such Rulings Related to It)

اَلْحُسَيْنُ بْنُ سَعِيدٍ عَنْ مُحَمَّدِ بْنِ أَبِي عُمَيْرٍ عَنْ سَلَمَةَ صَاحِبِ اَلسَّابِرِيِّ عَنْ إِسْحَاقَ بْنِ عَمَّارٍ قَالَ: قُلْتُ لِأَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ تُقَامُ اَلصَّلاَةُ وَ قَدْ صَلَّيْتُ فَقَالَ« صَلِّ وَ اِجْعَلْهَا لِمَا فَاتَ»

Al-Husayn ibn Said from Muhammad ibn Abi Umayr from Salamah, the companion of al-Sabiri, from Ishaq ibn Ammar, who said: I said to Abu Abdillah , peace be upon him: “The congregational prayer is being established while I have already prayed.” Imam said: “Pray, and count it for what you have missed.”

Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 3, p. 57
Shaykh Baqir al-Behbudi
Ṣaḥīḥ al-Tahdhīb, p. 270

Chapter on the Rulings of Congregational Prayer (the Minimum Number for Congregational Prayer, the Description of the Imam, Who Is to Be Followed and Who Is Not to Be Followed, Recitation Behind Both of Them, the Rulings of Those Led in Prayer, and Other Such Rulings Related to It)

Volume 3, Book 1, Chapter 3

Chapter on the Rulings of Congregational Prayer (the Minimum Number for Congregational Prayer, the Description of the Imam, Who Is to Be Followed and Who Is Not to Be Followed, Recitation Behind Both of Them, the Rulings of Those Led in Prayer, and Other Such Rulings Related to It)

Hadith #90