'Abdullah ibn 'Abbas was the Prophet's ﷺ cousin. He was still a boy when the Prophet ﷺ passed away, yet he grew to be one of the ummah's greatest scholars in explaining the Quran.
❝ HadithIbn 'Abbas said: the Messenger of Allah ﷺ went to relieve himself, and I set out water for his wudu. When he came out he asked: who put this here? When he was told, he prayed: O Allah, give him deep understanding of the religion.Sahih al-Bukhari 143 · Sahih
No one had told him, no one had taught him — a boy saw for himself what would be needed. In answer to that small service came a prayer whose fruit the ummah still enjoys.