Al-Husayn ibn Sa‘id from Ibn Abi Umayr from ‘Umar ibn Udhaynah from al-Hasan ibn Shihab:
Abu Abdillah عليه السلام said: “There must be a sitting between the Adhan and the Iqamah.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 68