Ali prayed two rakahs after the Asr prayer, and Umar
became angry with him and said, "Did you not know that the Messenger of Allah ﷺ used to forbid us from doing this?"
حدثنا الحسن بن يحيى قال أخبرنا ابن المبارك قال حدثنا معمر عن الزهري
أن عليا رضي الله عنه صلى بعد العصر ركعتين فتغيظ عليه عمر رضي الله عنه وقال أما علمت أن رسول الله ﷺ كان ينهانا عنها
Its chain is daif due to a break in transmission. This was discussed previously in 101, and this is an abridged version of it.