He narrated to them that the Messenger of Allah ﷺ admonished them one day after the morning prayer, and then he mentioned it.
حدثنا حيوة بن شريح حدثنا بقية حدثني بحير بن سعد عن خالد بن معدان عن ابن أبي بلال
أنه حدثهم أن رسول الله ﷺ وعظهم يوما بعد صلاة الغداة فذكره
Its isnad is sahih, its narrators are trustworthy, and they have already been mentioned.