The Prophet ﷺ said, "Seek help in fasting the day through the predawn meal, and in praying the night through the midday nap."
حدثنا محمد بن بشار حدثنا أبو عامر حدثنا زمعة بن صالح عن سلمة عن عكرمة
عن النبي ﷺ قال استعينوا بطعام السحر على صيام النهار وبالقيلولة على قيام الليل
No references are available.
Its isnad is daif. Hakim narrated it in 1/425 from the hadith of Abu Amir through this route. See no. 326 for its defect. It has a corroborating witness in Ilal by Ibn Abu Hatim, from Abu Hurairah, mentioned by Hafiz in Talkhis, 2/199.