The iqamah was called for the dawn prayer, and a man stood up to perform the two voluntary units. The Messenger of Allah ﷺ pulled him by his garment and said, "Are you praying the dawn prayer as four units?"
حدثنا يزيد حدثنا صالح بن رستم أبو عامر عن عبد الله بن أبي مليكة
أقيمت صلاة الصبح فقام رجل يصلي الركعتين فجذب رسول الله ﷺ بثوبه فقال أتصلي الصبح أربعا