The Messenger of Allah ﷺ said on the day of the Confederates, "From now on we will march against them, and they will not march against us."
حدثنا يحيى بن سعيد عن سفيان قال حدثني أبو إسحاق قال سمعت
قال رسول الله ﷺ يوم الأحزاب الآن نغزوهم ولا يغزونا
Its isnad is sahih, previously mentioned at 18225.