Ibn Umar witnessed the Conquest when he was twenty years old. He had with him a stubborn horse and a heavy spear. Ibn Umar went off to gather fodder for his horse, and the Messenger of Allah ﷺ said, "Abdullah! Abdullah!"
حدثنا سفيان عن ابن أبي نجيح
شهد ابن عمر الفتح وهو ابن عشرين سنة ومعه فرس حرون ورمح ثقيل فذهب ابن عمر يختلي لفرسه فقال رسول الله ﷺ إن عبد الله إن عبد الله