Aswad bin Yazid reported,

I asked Ayesha , "How was the night prayer of the Messenger of Allah ﷺ?"She replied, "He would sleep during the first part of the night and stand in worship during the latter part. Then, if he wished to be with his wife, he would do so and afterward go back to sleep. When the first call to prayer was made, he would spring up and pour water over himself. If he was not in a state of major impurity, he would simply perform the regular ablution for prayer and then pray two short units."In another narration, "The Messenger of Allah ﷺ used to pray during the night, making the witr his final prayer."

عن الأسود بن يزيد قال

سألت عائشة رضي الله عنها: كيف كانت صلاة رسول الله ﷺ بالليل؟ قالت: كان ينام أوله، ويحيي آخره، ثم إن كانت له حاجة إلى أهله قضى حاجته، ثم ينام. فإذا كان عند النداء الأول وثب فأفاض عليه الماء، وإن لم يكن جنبا توضأ وضوء الرجل للصلاة ثم صلى الركعتين. وفي رواية: كان رسول الله ﷺ يصلي من الليل حتى يكون آخر صلاته الوتر.