question #1 Sahih al-Bukhari 149, Book 4, Hadith 15 : What is the significance of the direction faced during answering the call of nature in Islamic tradition?

Once I went up the roof of our house and saw Allah’s Messenger (ﷺ) answering the call of nature while
sitting over two bricks facing Baitul-Maqdis (Jerusalem). (See Hadith No. 147).