Sa’ad ibn Abdillah from Musa ibn al-Hasan from Ayyub ibn Nuh from Safwan ibn Yahya from Said ibn Abdillah al-Araj, who said: I asked Aba Abdillah عليه السلام, peace be upon him, about a man who enters the mosque to pray with the imam (of prayer) and finds the row crowded with people, so he stands alone until the imam (of prayer) finishes the prayer, is that permissible for him? Imam عليه السلام said: “Yes, there is no harm in it.”