The beginning of the Mahāparinibbāna Sutta (DN 16) comes to mind.
So I have heard. At one time the Buddha was staying near Rājagaha, on the Vulture’s Peak Mountain. Now at that time King Ajātasattu Vedehiputta of Māgadha wanted to invade the Vajjis. He declared: “I will wipe out these Vajjis, so mighty and powerful! I will destroy them, and lay ruin and devastation upon them!”