Wealth and children are [but] adornment of the worldly life. But the enduring good deeds are better to your Lord1 for reward and better for [one's] hope.
Wealth and children are things of adornment in this worldly life. Wealth will only be of benefit in the afterlife if it is spent on that which pleases Allah. Actions and statements that are pleasing to Allah are better in reward than all the beauty in the world. That is the best thing a person can have hope in, because the beauty of the world will perish while the reward for actions and statements that are pleasing to Allah will last.