Rashi on the Former Prophets

They were swayed. Themselves.
[They] perverted. Something else, i.e., justice. Our Rabbis said that Shmuel's sons did not sin. They merely did not follow in their father's ways. Their father would travel to all places in Yisroel, and judge them in their cities. But they did not do so, in order to increase the income of their agents and scribes.

The matter was wrong. Because they said, "to judge us like all the nations."

But warn them. Warn them that the fear of their king be upon them.

And to produce his implements of war. To train them as craftsmen, blacksmiths, and carpenters.

For perfumers. Who prepare perfumes and spices for his wives' cosmetics.