Chapter 20: The Book of Qiyam Al-Lail (The Night Prayer) and Voluntary Prayers During the Day

It was narrated that Abu Dharr said: "We fasted with the Messenger of Allah (ﷺ) in Ramadan and he did not lead us in praying Qiyam until there were seven days left in the month, when he led us in praying Qiyam until one-third of the night had passed. Then he did not lead us in praying Qiyam when there were six days left. Then he led us praying Qiyam when there were five days left until one-half of the night had passed. I said: "O Messenger of Allah! What if we spend the rest of this night praying Nafl?" He said: "Whoever prays Qiyam with the Imam until he finishes, Allah (SWT) will record for him the Qiyam of a (whole) night." Then he did not lead us in prayer or pray Qiyam until there were three days of the month left. Then he led us in praying Qiyam when there were three days left. He gathered his family and wives (and led us in prayer) until we feared that we would miss Al-Falah. I (one of the narrators) said: "What is Al-Falah?" He said: "The suhur".
Sunan an-Nasa'i 1605
Chapters
1 The Book of Purification 2 The Book of Water 3 The Book of Menstruation and Istihadah 4 The Book of Ghusl and Tayammum 5 The Book of Salah 6 The Book of the Times (of Prayer) 7 The Book of the Adhan (The Call to Prayer) 8 The Book of the Masjids 9 The Book of the Qiblah 10 The Book of Leading the Prayer (Al-Imamah) 11 The Book of the Commencement of the Prayer 12 The Book of The At-Tatbiq (Clasping One's Hands Together) 13 The Book of Forgetfulness (In Prayer) 14 The Book of Jumu'ah (Friday Prayer) 15 The Book of Shortening the Prayer When Traveling 16 The Book of Eclipses 17 The Book of Praying for Rain (Al-Istisqa') 18 The Book of the Fear Prayer 19 The Book of the Prayer for the Two 'Eids 20 The Book of Qiyam Al-Lail (The Night Prayer) and Voluntary Prayers During the Day 21 The Book of Funerals 22 The Book of Fasting 23 The Book of Zakah 24 The Book of Hajj 25 The Book of Jihad 26 The Book of Marriage 27 The Book of Divorce 28 The Book of Horses, Races and Shooting 29 The Book of Endowments 30 The Book of Wills 31 The Book of Presents 32 The Book of Gifts 33 The Book of ar-Ruqba 34 The Book of 'Umra 35 The Book of Oaths and Vows 36 The Book of the Kind Treatment of Women 37 The Book of Fighting [The Prohibition of Bloodshed] 38 The Book of Distribution of Al-Fay' 39 The Book of al-Bay'ah 40 The Book of al-'Aqiqah 41 The Book of al-Fara' and al-'Atirah 42 The Book of Hunting and Slaughtering 43 The Book of ad-Dahaya (Sacrifices) 44 The Book of Financial Transactions 45 The Book of Oaths (qasamah), Retaliation and Blood Money 46 The Book of Cutting off the Hand of the Thief 47 The Book Of Faith and its Signs 48 The Book of Adornment 49 The Book of the Etiquette of Judges 50 The Book of Seeking Refuge with Allah 51 The Book of Drinks