Abdullah bin Tawus عبد الله بن طاوس · Establishing the Prayer and the Sunnah Regarding Them

It was narrated from Anas bin Malik that the Prophet (ﷺ) did not raise his hands in any of his supplications except when praying for rain (Istisqa’), when he raised his hands so high that the whiteness of his armpits could be seen.

“I was with Ibn ‘Umar and I lagged behind and prayed Witr. He said: ‘What kept you?’ I said: ‘I was praying Witr.’ He said: ‘Do you not have the best of examples in the Messenger of Allah (ﷺ)?’ I said: ‘Of course.’ He said: ‘The Messenger of Allah (ﷺ) used to pray Witr while riding his camel.’”