James 4:3
And when you do ask, you do not receive, because you ask with wrong motives, that you may squander it on your pleasures.

Proverbs 15:8
The sacrifice of the wicked is detestable to the LORD, but the prayer of the upright is His delight.

Proverbs 21:27
The sacrifice of the wicked is detestable--how much more so when brought with ill intent!

Isaiah 1:15
When you spread out your hands in prayer, I will hide My eyes from you; even though you multiply your prayers, I will not listen. Your hands are covered with blood.

Isaiah 58:3, 4
"Why have we fasted, and You have not seen? Why have we humbled ourselves, and You have not noticed?" "Behold, on the day of your fast, you do as you please, and you oppress all your workers. . . .