(Al-Insan) 76 : 26
وَمِنَ اللَّيْلِ فَاسْجُدْ لَهُ وَسَبِّحْهُ لَيْلًا طَوِيلًا
Then during the night; prostrate before Him and glorify Him for a long time.
Here, prostrate and glorify Allah means to perform Swalath in the night i.e. ‘Thahajjud Swalath’. This command is intended for Prophet and believers of Prophet’s period. Whereas today, the Three Times Knower taught through Prophet that the literate one should holdfast Adhikr -the real Knowledge to become a believer- with his molar teeth and should do a single prostration glorifying his Lord and praying .
Without being a believer with Adhikr which is Permission of Allah, no deeds like Swalath (Prayer), Fasting, Hajj etc. will be accepted, instead there will be punishment in the Hell fire as a fine. See the explanation 2: 186; 13: 14; 25: 65-66 and 40:50.