Sahih al-Bukhari 6563

Narrated `Adi bin Hatim:

The Prophet (ﷺ) mentioned the Fire and turned his face aside and asked for Allah’s protection from it, and
then again he mentioned the Fire and turned his face aside and asked for Allah’s protection from it and
said, “Protect yourselves from the Hell-Fire, even if with one half of a date, and he who cannot afford
that, then (let him do so) by (saying) a good, pleasant word.”