Partake of Sehri to assist with fasting during the day and have a siesta to assist with standing up for prayer at night
Imam Ibn Majah (rahimahullah) has recorded this narration.
Sayyiduna ‘Abdullah ibn ‘Abbas (radiyallahu ‘anhuma) reported that Nabi (sallallahu ‘alayhi wa sallam) said: “Partake of the pre dawn meal (suhur) to assist with fasting during the day and have a siesta to assist with offering [Tahajjud Salah].”
(Sunan Ibn Majah, Hadith: 1694. Also see: Sahih Ibn Khuzaymah, Hadith: 1939)
Although the Hadith in question is weak, it is corroborated and suitable to quote.
(Refer: Al Maqasidul Hasanah, Hadith: 102. Also see: Targhib, vol. 2 pg. 138)
And Allah Ta’ala Knows best.
Answered by: Moulana Suhail Motala
Approved by: Moulana Muhammad Abasoomar
This answer was collected from HadithAnswers.com. The answers were either answered or checked by Moulana Haroon Abasoomar (rahimahullah) who was a Shaykhul Hadith in South Africa, or by his son, Moulana Muhammad Abasoomer (hafizahullah), who is a Hadith specialist.