From the Twenty-Seventh Discourse—page 581
in Irshad: Wisdom of a Sufi Master, by Sheikh Muzaffer Ozak Al-Jerrahi, trans. Muhtar Holland. An Ashki Book of Amity House, Warwick: 1988.
It is very significant that night should be mentioned after the forenoon [in sura 93 of the Qur’an]. Night was the time of our blessed Master’s Ascension and it was at night that he attained the rank of the Two Bow-Lengths. On that night of his Ascension thousands of mysteries were disclosed to him. During his communion with his Lord, he responded to the divine greeting: “O Mustafā, O My Beloved,” with: “Doubly at Your service, O Lord of All the Worlds!”
For the sake of our instruction, he then heard himself addressed by the Almighty: “O My Beloved, do not incline your noble heart to this world with its pomp and show. I have not created this world as your permanent abode. Worldly life is nothing but a marketplace, which I have created so that knowledge of Allāh may be acquired. This world is the field of the Hereafter. What is sown in the former is reaped in the latter.”
The All-Glorious Lord was saying to his Beloved: “Your heart is sound. Do not remove that noble heart from Me; do not become attached to anything other than Me. I am Your Supreme Goal in this world and the Next. To Me you shall return again. O My Beloved Muhammad, devote your nights not to sleep but to My worship and service. Arise and perform the prayer of Night Vigil [tahajjud] which is very dear to Me. Those who pray at night enjoy My support and favor. If a person recites the noble Sūra Yā Sīnduring his vigil-prayer in the heart of the night, I shall grant that servant of Mine support and salvation in this world and the Hereafter. I shall accept his supplications immediately and cause him to achieve and attain his every wish.”
The venerable Moses said to his Lord while communing with Him upon Mount Sinai: “O Lord, let me know the time at which supplications are speedily accepted, so that I may choose that time to offer my pleas and requests to you.” He then received this response from the Almighty: “O My Converser, offer your prayers to me at the time of Night Vigil, for at that time I accept supplications offered to Me, pardon sins and do not withhold My forgiveness from those who seek it.”