The Messenger of Allah (ﷺ) said: When one of you places in front of him so me. thing such as the back of a saddle, he should pray without caring who passes on the other side of it.
Sahih Muslim Book 4, Hadith 273
← Previous Hadith The Messenger of Allah (ﷺ) used to begin prayer with takbir (saying Allahu Akbar) and the recitation: "Praise be to Allah, the Lord of the Universe." When he bowed he neither kept his head up nor bent it down, but kept it between these extremes; when he raised his head after bowing he did not prostrate himself till he had stood erect; when he raised his head after prostration he did not prostrate himself again till he sat up. At the end of every two rak'ahs he recited the tahiyya; and he used to place his left foot flat (on the ground) and raise up the right; he prohibited the devil's way of sitting on the heels, and he forbade people to spread out their arms like a wild beast. And he used to finish the prayer with the taslim.

Sahih Muslim Book 4, Hadith 272 Next Hadith → We used to say prayer and the animals moved in front of us. We mentioned it to the Messenger of Allah (ﷺ) and he said: If anything equal to the back of a saddle is in front of you, then what walks in front, no harm would come to him. Ibn Numair said: No harm would come whosoever walks in front.

Sahih Muslim Book 4, Hadith 274