O, Dwellers of Paradise, and they would say in response: At thy service and pleasure, our Lord, the good is in Thy Hand. He (the Lord) would say: Are you well pleased now? They would say: Why should we not be pleased, O Lord, when Thou hast given us what Thou hast not given to any of Thy creatures? He would, however, say: May I not give you (something) even more excellent than that? And they would say: O Lord, what thing can be more excellent than this? And He would say: I shall cause My pleasure to alight upon you and I shall never be afterwards annoyed with you.
Sahih Muslim Book 53, Hadith 10
"My father narrated to me, from Qatadah, from Zurarah bin Awfa, from Sa'd bin Hisham, that Aishah said: 'When the Messenger of Allah (ﷺ) prayed witr with nine rak'ahs, he did not sit until the eighth rak'ah. Then he would praise Allah (SWT) and remember Him and supplicate, then he would get up and he wouldn't say the taslim, then he prayed the ninth, then he sat and remembered Allah (SWT) and supplicated. Then he said a taslim that we could hear. Then he prayed two rak'ahs sitting down. When he grew older and weaker, he prayed witr with seven rak'ahs and did not sit until the sixth. Then he got up and did not say the taslim, and prayed the seventh, then he said the taslim, then he prayed two rak'ahs sitting down.'"
Sunan an-Nasa'i Book 20, Hadith 122