Abu-l-Qasim (the Prophet) said, "On Friday there is a particular time. If a Muslim happens to be praying and invoking Allah for something good during that time, Allah will surely fulfill his request." The Prophet ﷺ pointed out with his hand. We thought that he wanted to illustrate how short that time was.  

أَبُو الْقَاسِمِ ﷺ فِي الْجُمُعَةِ سَاعَةٌ لاَ يُوَافِقُهَا مُسْلِمٌ وَهْوَ قَائِمٌ يُصَلِّي يَسْأَلُ خَيْرًا إِلاَّ أَعْطَاهُ وَقَالَ بِيَدِهِ قُلْنَا يُقَلِّلُهَا يُزَهِّدُهَا