'Abdullah b. Umar said to me: Did you hear anything from your father narrating something from the messenger of Allah ﷺ about the time on Friday? I said: Yes, I heard him say from the Messenger of Allah ﷺ (these words):" It is between the time when the Imam sits down and the end of the prayer."
عَنْ رَسُولِ اللَّهِ ﷺ فِي شَأْنِ سَاعَةِ الْجُمُعَةِ قَالَ قُلْتُ نَعَمْ سَمِعْتُهُ يَقُولُ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ «هِيَ مَا بَيْنَ أَنْ يَجْلِسَ الإِمَامُ إِلَى أَنْ تُقْضَى الصَّلاَةُ»