You ask and you do not receive, because you ask badly, so that you may use it toward your own desires
Other versions
King James Version
Ye ask, and receive not, because ye ask amiss, that ye may consume it upon your lusts. English Standard Version
You ask and do not receive, because you ask wrongly, to spend it on your passions.New International Version
When you ask, you do not receive, because you ask with wrong motives, that you may spend what you get on your pleasures.