Sahih al-Bukhari 616

Narrated `Abdullah bin Al-Harith:

Once on a rainy muddy day, Ibn `Abbas delivered a sermon in our presence and when the Mu’adhdhin
pronounced the Adhan and said, “Haiyi `ala-s-sala(t) (come for the prayer)” Ibn `Abbas ordered
him to say ‘Pray at your homes.’ The people began to look at each other (surprisingly). Ibn `Abbas
said. “It was done by one who was much better than I (i.e. the Prophet (ﷺ) or his Mu’adh-dhin), and it is a
license.’