And the companion Sulaiman bin Surad spoke during the adhan, and Hasan al-Basri said that if a person laughs while giving the adhan or the takbir, there is no harm.

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 or his Mu'adh-dhin), and it is a license.'