Abdur-Raḥmān ibn Zaid ibn Aslam said, “A man was with Ibn ʿUmar on a journey. When any food was brought, he would take a bite from it and then wipe his hand [i.e., stop eating], and when a drink would be brought he would take a sip from it [and then leave it]. So Ibn ʿUmar said to him, ‘My brother’s son! Why do you not eat enough to satisfy your appetite and drink until you quench your thirst?’ He replied, and there was a fire burning in front of Ibn Umar, ‘No, by Allāh, not until I see where I will be tomorrow [in the Hereafter] and where my [final] abode will be!’
So after that Ibn ʿUmar was never seen eating to his fill again until he met Allāh.”
Al-Jūʿ, [‘The Book of Hunger’ of Ibn Abid-Dunyaa], pp. 185-186.