From Sahih Bukhari (Hadith 357):
Narrated Abu Murra:(the freed slave of Um Hani) Um Hani, the daughter of Abi Talib said, "I went to Allah's Messenger (ﷺ) in the year of the conquest of Mecca and found him taking a bath and his daughter Fatima was screening him. I greeted him. He asked, 'Who is she?' I replied, 'I am Um Hani bint Abi Talib.' He said, 'Welcome! O Um Hani.' When he finished his bath he stood up and prayed eight rak`at while wearing a single garment wrapped round his body and when he finished I said, 'O Allah's Messenger (ﷺ) ! My brother has told me that he will kill a person whom I gave shelter and that person is so and so the son of Hubaira.' The Prophet (ﷺ) said, 'We shelter the person whom you have sheltered.' " Um Hani added, "And that was before noon (Duha)
Reference: Bukhari 357