Messenger of Allah ﷺ talked about Friday and said, "There is an hour (opportune time) on Friday and if a Muslim gets it while praying and asks something from Allah, then Allah will definitely meet his demand." And he (the Prophet) pointed out the shortness of that time with his hands.  

أَنَّ رَسُولَ اللَّهِ ﷺ ذَكَرَ يَوْمَ الْجُمُعَةِ فَقَالَ فِيهِ سَاعَةٌ لاَ يُوَافِقُهَا عَبْدٌ مُسْلِمٌ وَهْوَ قَائِمٌ يُصَلِّي يَسْأَلُ اللَّهَ تَعَالَى شَيْئًا إِلاَّ أَعْطَاهُ إِيَّاهُ وَأَشَارَ بِيَدِهِ يُقَلِّلُهَا