https://abukhadeejah.com/whenever-ibn-umar-heard-a-narration-he-would-do-no-more-than-it-and-no-less-ibn-majah/
“Whenever Ibn ‘Umar heard a narration of Allah’s Messenger (salallāhu ‘alaihi wasallam) he would do no more than it and no less than it.” Explanation of Kitābus-Sunnah from Sunan Ibn Mājah (Hadeeth 4)