Narrated from him from Ja’far ibn Bashir from al-Hasan ibn Shihab, who said:
I (al-Hasan ibn Shihab) heard Abu Abdillah عليه السلام say: "There is no harm if a man speaks while he is giving the iqamah, or after he has given the iqamah, if he wishes."
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 59