Surah Al Furqan Tafseer

And those who spend the night in worship of their Lord, prostrate and standing.

meaning, worshipping and obeying Him.

This is like the Ayat:

كَانُواْ قَلِيلً مِّن الَّيْلِ مَا يَهْجَعُونَ

وَبِالاٌّسْحَـرِ هُمْ يَسْتَغْفِرُونَ

They used to sleep but little by night. And in the hours before dawn, they were asking for forgiveness. (51:17-18)

تَتَجَافَى جُنُوبُهُمْ عَنِ الْمَضَاجِعِ

Their sides forsake their beds... (32:16)

أَمَّنْ هُوَ قَانِتٌ ءَانَأءَ الَّيْلِ سَـجِداً وَقَأيِماً يَحْذَرُ الاٌّخِرَةَ وَيَرْجُواْ رَحْمَةَ رَبِّهِ

Is one who is obedient to Allah, prostrating himself or standing during the hours of the night, fearing the Hereafter and hoping for the mercy of his Lord... (39:9)

Allah says:

وَالَّذِينَ يَقُولُونَ رَبَّنَا اصْرِفْ عَنَّا عَذَابَ جَهَنَّمَ إِنَّ عَذَابَهَا كَانَ غَرَامًا