Translation:

27. Verily spendthrifts are brothers of the Evil Ones; and the Evil One is to his Lord (Himself) ungrateful.

Notes (Tafseer)

2210. Spendthrifts are not merely fools. They are of the same family as the Satans. And the Satan himself-fell by his ingratitude to Allah. So those who misuse or squander Allah's gifts are also ungrateful to Allah.