“And if they only knew what was in the prayers of ‘Isha’ and Subh [Fajr], they would come to them even if they had to crawl.” [Al-Bukhari & Muslim]
“One who performs `Isha’ prayer in congregation, is as if he has performed Salat for half of the night. And one who performs the Fajr prayer in congregation is as if he has performed Salat the whole night.” [Muslim]
“No Salat is more burdensome to the hypocrites than the Fajr (dawn) prayer and the `Isha’ (night) prayer; and if they knew their merits, they would come to them even if they had to crawl to do so.” [Al-Bukhari & Muslim]
So, If we pray Isha (8:00 pm at SNMC) in jamah at masjid, we will get ajr as if we are busy with ibadah for half of the night. If we also pray Fajr (6:30 am at SNMC)in Jamah, we will be counted as if we are busy with ibadah all night.