This is my morning meal.  If I do not take my morning meal, I lose my strength.

—Ibn Taymiyyah [d. 728AH] to Ibn al-Qayyim after performing the pre-dawn prayer and then sitting to remember Allah until sunrise.

[The same is reported of Ibn al-Qayyim by Ibn Hajar; likely an adopted practice from his teacher]

(Read on pg 50, Ibn Qayyim al-Jawziyya, The Invocation of God. The Islamic Texts Society. UK:2000 .)