Chapter 46 of the Tao Te Ching

天tiān下xià有yǒu道dào，却 què走zǒu马mǎ以yǐ粪fèn；天tiān下xià无wú道dào，戎róng马mǎ生shēng于yú郊jiāo。
罪zuì莫mò大dà于yú可kě欲yù，祸huò莫mò大dà于yú不bù知zhī足zú，咎jiù莫mò大dà于yú欲yù得dé。
故gù知zhī足zú之zhī足zú，常cháng足zú。
 

老子 Lǎozǐ shows in this chapter the misfortunes that arise from the multitude of desires and activity (the opposite of non-action), and the happiness of the sage who knows how to preserve himself through moderation.

In ancient times, the princes who possessed the 道 Dào were pure, calm, and free from desires; they converted men through non-action. This is why the people lived in peace and were content with their lot. The 马 mǎ, which were previously intended for combat, were left, and were used only to cultivate the fields. Thus, every family, every man had all that was necessary for them. Since the age has become corrupt and the 道 Dào has declined, the sages no longer appear in the world. The vassals give themselves over to violence and disorder. Each of them strives to enrich their kingdom and dominate by force of arms; their ambition is insatiable. They engage in continuous battles. This is why the 戎马 róngmǎ are born on the borders.

When the empire follows the right path, the 马 mǎ (of the army) are sent back, and they are not used at all. Men devote themselves solely to cultivating the fields. — When the empire does not follow the right path, etc.

By 却走马 què zǒu mǎ, we mean the 马 mǎ of the army, 阵马 zhènmǎ.

The war dragging on, the 马 mǎ no longer return to the interior of the kingdom, and remain outside the borders for so long that they can propagate their race there.

The rest of the chapter presents no difficulty.