The Prophet ﷺ was brought a vessel containing water just enough to cover his fingers, or perhaps not even covering them. Saeed was uncertain. The people began performing ablution while water gushed forth from between his fingers.The narrator said, "We asked Anas, 'How many of you were there?'"He replied, "Three hundred."
حدثنا محمد بن بكر قال أخبرنا سعيد عن قتادة
أتي النبي ﷺ بإناء فيه ماء قدر ما يغمر أصابعه أو لا يغمر أصابعه شك سعيد فجعلوا يتوضئون والماء ينبع من بين أصابعه قال قلنا لأنس كم كنتم قال ثلاث مائة
Its isnad is sahih. It preceded at 12436, but this is a different incident, and there are many such incidents.