Sahih al-Bukhari, 417

Narrated Anas:The Prophet (ﷺ) saw expectoration (on the wall of the mosque) in the direction of the Qibla and scraped it off with his hand. It seemed that he disliked it and the sign of disgust was apparent from his face. He said, "If anyone of you stands for the prayer, he is speaking in private to his Lord, (or) his Lord is between him and his Qibla, therefore he should not spit towards his Qibla, but he could spit either on his left or under his foot." Then he took the corner of his sheet and spat in it, folded it and said, "Or do this

Rapporté par Anas : Le Prophète (ﷺ) a vu des expectorations (sur le mur de la mosquée) en direction de la Qibla et les a enlevées avec sa main. Il semblait qu’il n’aimait pas cela et cela se voyait sur son visage. Il a dit : « Si l’un de vous se tient pour prier, il parle en privé à son Seigneur, (ou) son Seigneur est entre lui et sa Qibla, donc il ne doit pas cracher vers sa Qibla, mais il peut cracher à sa gauche ou sous son pied. » Ensuite, il a pris le coin de son vêtement, a craché dedans, l’a replié et a dit : « Ou faites comme cela. »