Hadith Q2708

وَتَبْقَى السُّنَّةُ قَائِمَةً إِلَى الْأَبَدِ إِذِ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّمَا رَمَلَ فِي الِابْتِدَاءِ وَاضْطَبَعَ لِيُرِيَ الْمُشْرِكِينَ قُوَّتَهُ وَقُوَّةَ أَصْحَابِهِ فَبَقِيَ الِاضْطِبَاعُ وَالرَّمَلُ سُنَّتَيْنِ إِلَى آخِرِ الْأَبَدِ
Then that reason comes to an end, but the Sunnah of the Prophet remains until the Day of Judgment, because the Noble Prophet (peace be upon him) initially performed ramal and idtiba‘ to show the strength and power of himself and his companions to the polytheists. (Then the polytheists in Makkah were eliminated), but both Sunnahs of ramal and idtiba‘ will remain until the Day of Judgment.
Hadith Reference صحيح ابن خزيمه / جماع أبواب ذكر أفعال اختلف الناس فى إباحته للمحرم، نصت سنة النبى صلى الله عليه وسلم أو دلت على إباحتها / Q2708