5. Book of Rites
٥۔ كِتَابُ الْمَنَاسِكِ
[Machine] The Messenger of Allah ﷺ was asked, "Which Hajj is better?" He replied, "Performing Tawaf (circumambulation) of the Kaaba (Al-'Aj) and offering animal sacrifice (Al-Thaj)." Al-'Aj refers to performing the Tawaf, and Al-Thaj refers to the act of sacrificing an animal.
سُئِلَ رَسُولُ اللَّهِ ﷺ أَيُّ الْحَجِّ أَفْضَلُ؟ قَالَ «الْعَجُّ وَالثَّجُّ» الْعَجُّ يَعْنِي التَّلْبِيَةَ وَالثَّجُّ يَعْنِي إِهْرَاقَ الدَّمِ