THE TREASURE OF THE NIGHT
'They forsake their beds of sleep while they call on their Lord in fear and hope, and they spend of what We bestowed them. No person knows what pleasures are hidden for them as reward for their (good) deeds.'

(Surah Sajdah Aayat 16-17)

One of the 13 signs of the slaves of Allah (Ibaadur Rahmaan) is: 'They are those who spend the night prostrating and standing before their Lord, i.e. in Tahajjud Salaah.' (Surah Furqaan Aayat 64)

The performance of Nafl Salaah (Tahajjud) during the latter part of the night or the early hours of the morning was the constant practice of Rasulullah [sallallaahu alayhi wasallam]. Sayyidatuna Aaishah [radhiallaahu anha] says: 'Do not abandon the Salaah of the night, for certainly Rasulullah r would never leave out his Tahajjud Salaah. If he r would be ill or weak, he would perform tahajjud while sitting.' (Sunan Abi Dawud Hadith1301; Sahih ibn Khuzaymah Hadith1137)

Tahajjud was also an integral part of the lives of the Sahaabah [radhiallaahu anhum] who were known to be knights / warriors by day and devout worshippers