We used to practise 'azl during the lifetime of Allah's Messenger (ﷺ). This (the news of this practise) reached Allah's Apostle (ﷺ), and he did not forbid us.
Sahih Muslim Book 16, Hadith 163
← Previous Hadith We used to practise 'azl during the life of Allah's Messenger (ﷺ).

Sahih Muslim Book 16, Hadith 162 Next Hadith → Perhaps he (the man accompanying her) intends to cohabit with her. They said: Yes. Thereupon Allah's Messenger (ﷺ) said: I have decided to curse him with such a curse as may go along with him to his grave. How can he own him (the child to be born) and that is not lawful for him, and how can he take him as a servant for that is not lawful for him?

Sahih Muslim Book 16, Hadith 164