But Abram said to the king of Sodom, “I have lifted my hand to the LORD, God Most High, Possessor of heaven and earth, that I would not take a thread or a sandal strap or anything that is yours, lest you should say, ‘I have made Abram rich.’
#genesis 14:22-23 #lekhlekha

There's nothing immoral about doing business with wicked people or accepting gifts or rewards from them, but it's good to avoid anything that might put you in their debt or even that might appear to. The wicked are schemers and will likely use it against you.