James 4:3

Verse 3 Ye ask, and receive not, because ye ask amiss.

Even when you did ask you did not receive, because you asked that you might be enabled thereby to carry out a wicked purpose. Hence your asking was amiss. Your petition was wrong, and was therefore unheeded.

That you might consume it upon your lusts.

The thought here is not so obvious. If riches were asked for, then the use to which the same would be applied could easily be determined. I can not think from the apostle's reasoning that he intended to convey this idea. Yet if, in their zeal, a convert should be made to Judaism, money might the more easily be extorted from such, and then be appropriated in pandering to their appetites. And this is probably the idea.