question #1 Sahih al-Bukhari 1214, Book 21, Hadith 18 : What is the significance of maintaining cleanliness and etiquette during prayer?

The Prophet (ﷺ) said, “Whenever anyone of you is in prayer, he is speaking in private to his Lord and so
he should neither spit in front of him nor on his right side but to his left side under his left foot.”