Shama-il Tirmidhi Chapter 39, Hadith Number 12 (259).

‘Aayeshah Radiyallahu ‘Anha reports that: “Rasulullah Sallallahu ‘Alayhi Wasallam performed nine rak’ahs at night”.

Commentary
In the madh-hab of the Hanafis this is six rak’ahs tahajjud and three rak’ahs witr. In a narration from Sayyidina ‘Abdullah bin Abi Qays Radiyallahu ‘Anhu, Sayyiditina ‘Aayeshah Radiyallahu ‘Anha herself has said the words: ‘Six and three’.