Allah's Messenger (ﷺ) offered the `Isha' prayer (and then got up at the Tahajjud time) and offered eight rak`at and then offered two rak`at while sitting. He then offered two rak`at in between the Adhan and Iqama (of the Fajr prayer) and he never missed them.
Sahih al-Bukhari Book 19, Hadith 38
← Previous Hadith Ibn `Umar said, "In the lifetime of the Prophet (ﷺ) I dreamt that a piece of silk cloth was in my hand and it flew with me to whichever part of Paradise I wanted. I also saw as if two persons (i.e. angels) came to me and wanted to take me to Hell. Then an angel met us and told me not to be afraid. He then told them to leave me. Hafsa narrated one of my dreams to the Prophet (ﷺ) and the Prophet (ﷺ) said, "Abdullah is a good man. Would that he offer the night prayer (Tahajjud)!" So after that day `Abdullah (bin `Umar) started offering Tahajjud. The companions of the Prophet (p.b.u.h) used to tell him their dreams that (Laila-tul-Qadr) was on the 27th of the month of Ramadan. The Prophet (ﷺ) said, "I see that your dreams agree on the last ten nights of Ramadan and so whoever is in search of it should seek it in the last ten nights of Ramadan."

Sahih al-Bukhari Book 19, Hadith 37 Next Hadith → The Prophet (ﷺ) used to lie down on his right side, after offering two rak`at (Sunna) of the Fajr prayer.

Sahih al-Bukhari Book 19, Hadith 39