Mengzi -> Teng Wen Gong II

After the death of Yao and Shun, the principles that mark sages fell into decay. Oppressive sovereigns arose one after another, who pulled down houses to make ponds and lakes, so that the people knew not where they could rest in quiet; they threw fields out of cultivation to form gardens and parks, so that the people could not get clothes and food. Afterwards, corrupt speakings and oppressive deeds became more rife; gardens and parks, ponds and lakes, thickets and marshes became more numerous, and birds and beasts swarmed. By the time of the tyrant Zhou, the kingdom was again in a state of great confusion. Zhou Gong assisted king Wu, and destroyed Zhou. He smote Yan, and after three years put its sovereign to death. He drove Fei Lian to a corner by the sea, and slew him. The States which he extinguished amounted to fifty. He drove far away also the tigers, leopards, rhinoceroses, and elephants - and all the people was greatly delighted. It is said in the Book of History, "Great and splendid were the plans of king Wen! Greatly were they carried out by the energy of king Wu! They are for the assistance and instruction of us who are of an after day. They are all in principle correct, and deficient in nothing."

https://ctext.org/mengzi/teng-wen-gong-ii#n13328