question #1 Sahih al-Bukhari 752, Book 10, Hadith 146 : How can distractions during prayer affect one’s concentration and devotion?

Once the Prophet (ﷺ) prayed on a Khamisa with marks on it and said, “The marks on it diverted my
attention, take this Khamisa to Abu Jahm and bring an Inbijaniya (from him.)”