[Machine] The Messenger of Allah ﷺ said, "If one of you intends to perform I'tikaf (spiritual seclusion in a mosque), then he should do so for three days. In this, there is an indication that he orders seeking spiritual seclusion in odd numbers, and the most virtuous odd number is the number one."
قَالَ رَسُولُ اللهِ ﷺ إِذَا اسْتَجْمَرَ أَحَدُكُمْ فَلْيَسْتَجْمِرْ ثَلَاثًا وَفِي هَذَا كَالدَّلَالَةِ عَلَى أَنَّ أَمْرَهُ بِالِاسْتِجْمَارِ وِتْرًا هُوَ الْوِتْرُ الَّذِي يَزِيدُ عَلَى الْوَاحِدِ