TAHAJJUD NAMAAZ (nafil)
'Remain arisen (to pray) in the night except some portion there of'
'A half of it, or a little less'
(Surah Al-Muzammil. verse 2,3)
'Spend most of the time at night in the worship of Allah Ta'ala, do take some time to rest'
'Spend half the night in the worship of Allah Ta'ala or more or less or that time. This is left to your discretion. This tells us that perform Salaatul Tahajjud with great deal of fervour. Perform Salaatul Tahajjud upon your choice, the minimum two rakaats and maximum from eight to twelve rakaats.
It should be remembered that at the beginning of Islam Tahajjud Salaah was wajib or farz'.
(Tafseer Noor Ul Irfaan with English translation of Kanzul Imaan)
Tahajjud Namaaz is performed after the Isha Namaaz after getting up from sleep.
