Busr bin Sa'id narrates: Abu Juham sent me to ask Sayyiduna Zaid bin Khalid al-Juhani (may Allah be pleased with him) what hadith he had heard regarding a person passing in front of someone who is praying. He replied: I heard the Prophet Muhammad (peace and blessings be upon him) say: "For a person to wait for forty is better for him than to pass in front of someone who is praying." However, it is not known whether forty refers to years, days, or hours.