Surat Al Isra' (79-80)

{وَمِنَ اللَّيْلِ فَتَهَجَّدْ بِهِ نَافِلَةً لَّكَ عَسَى أَن يَبْعَثَكَ رَبُّكَ مَقَاماً مَّحْمُوداً} (الإسراء: 79)

79- O Prophet, stay up after your sleep and offer Salatut-Tahajjud in addition to other obligatory duties and keep to it so that Allah would grant you a high station on the Day of Resurrection for which the former and the later will praise. It seems it is the station of intercession where Allah would ease them with the Prophet's intercession against the intensity and horror of the Day of Gathering when all Prophets (peace be upon them) shall apologize to intercede.

Tahjjud or Qiyam contains the Witr Salah, and it is eleven Rak`ah or thirteen Rak`ah. It is a Sunnah to all Muslims and has a great favor and reward. The Prophet (peace be upon him) said: "Keep to Qiyam-ul-Layl, for it is the habit of righteous people before you. Qiyam-ul-Layl is a kind act by which you draw nearer to Allah, a prevention of sins, atonement for sins, and expeller to diseases from the body." Authentic Hadith with the wordings of At-Timidhy.

The ruling of Qiyam-ul-Layl concerning the Prophet (peace be upon him) is demonstrated in the explanation of the last Ayahs of Surat Al Muzzammil.

{وَقُل رَّبِّ أَدْخِلْنِي مُدْخَلَ صِدْقٍ وَأَخْرِجْنِي مُخْرَجَ صِدْقٍ وَاجْعَل لِّي مِن لَّدُنكَ سُلْطَاناً نَّصِيراً} (الإسراء : 80)

80- O Messenger, say in your invocation: "My Lord! Let my entry (to the city of Al-Madinah) be good" i.e., a good entry to a place where there is no reprehensible matter, that place was Medina. "and likewise my exit (from the city of Makkah) be good." A security with no reprehensible matter which was Makkah. It was reported in the authentic Hadith of Ibn `Abbas: The Prophet (peace be upon him) was at Makkah then he was commanded to migrate to Medina, so Allah revealed: "My Lord! Let my entry (to the city of Al-Madinah) be good."

And give me a great power and security from You to use against my enemy to overpower them.