The prayer is highly rewarding due to its mentions in the Quran and by the Prophet (PBUH). As one has to perform Tahajjud in between the Isha and Fajr prayer, one has to wake up at night for the prayer. Therefore, it is also known as the night prayer. Tahajjud is an Arabic word derived from “h-j-d”, which menas to remain awake at night. Missing this prayer is not considered to be a sin. Nafl: The last of the four main types of prayer, Nafl is not compulsory and is usually performed for an extra virtue.However, missing the latter one, which is said to be practiced intermittently by Prophet Muhammad (PBUH), is not considered punishable. The former is to be practiced regularly, and missing the same is regarded as a sin. Sunnah Salat: Known to be Prophet Muhammad’s (PBUH) practice, Sunnah Salat is again segregated into two categories, namely Muakkadah and Ghair Muakkadah.Wajib Salat: It is compulsory, and missing Wajib Salat is regarded as a grave sin too.Fardh Salat: The most important prayer in Islam it is compulsory, and missing it is considered to be a major sin.Prayer (Salat) - one of the Five Pillars of Islam, is segregated into four main types: It is a night prayer that is offered to attain mental strength and peace. Tahajjud prayer is a nafl or voluntary prayer.
