It was the Sunnah of the Messenger of Allah ﷺ, i.e., tamattuʿ (in Hajj), but I am afraid that they will have intimate relations with them (their wives) beneath the Arak trees, then they will bring them for Hajj.
هِيَ سُنَّةُ رَسُولِ اللهِ ﷺ يَعْنِي الْمُتْعَةَ وَلَكِنِّي أَخْشَى أَنْ يُعَرِّسُوا بِهِنَّ تَحْتَ الْأَرَاكِ ثُمَّ يَرُوحُوا بِهِنَّ حُجَّاجًا