Musnad Ahmad Hadith 3224

The Messenger of Allah (ﷺ) said to me on the morning of (stoning) al-'Aqabah (i.e., the 10" of Dhul-Hijjah), when he was sitting on his mount: "Pick up (pebbles) for me.” I picked up for him small pebbles (the size of broad beans). When he took them in his hand, he said: "Yes, like these,” twice, And he gestured with his hand - Yahya indicated that he raised it - and said: “Beware of going to extremes in religious matters, for those who came before you were destroyed because of going to extremes in religious matters.”