There is an hour during the night in which no Muslim individual will ask Allah for good in this world and the next without His giving it to him; and that applies to every night.  

سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ إِنَّ فِي اللَّيْلِ لَسَاعَةً لاَ يُوَافِقُهَا رَجُلٌ مُسْلِمٌ يَسْأَلُ اللَّهَ خَيْرًا مِنْ أَمْرِ الدُّنْيَا وَالآخِرَةِ إِلاَّ أَعْطَاهُ إِيَّاهُ وَذَلِكَ كُلَّ لَيْلَةٍ  

I heard the Messenger of Allah ﷺ as saying: There is an hour during the night in which no Muslim bondman will ask Allah for good in this world and the next but He will grant it to him.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِنَّ مِنَ اللَّيْلِ سَاعَةً لاَ يُوَافِقُهَا عَبْدٌ مُسْلِمٌ يَسْأَلُ اللَّهَ خَيْرًا إِلاَّ أَعْطَاهُ إِيَّاهُ