Then you will call, and the Lord will answer; you will cry for help, and he will say: Here am I. "If you do away with the yoke of oppression, with the pointing finger and malicious talk, and if you spend yourselves in behalf of the hungry and satisfy the needs of the oppressed, then your light will rise in the darkness, and your night will become like noonday.  - Isaiah 58:9-10

“They greatly love to wander; they do not restrain their feet. So the Lord does not accept them; he will now remember their wickedness and punish them for their sins.” Then the Lord said to me, “Do not pray for the well-being of this people. Although they fast, I will not listen to their cry; though they offer burnt offerings and grain offerings, I will not accept them. Instead, I will destroy them with the sword, famine and plague.” - Jeremiah 14:10-12

        

 “By offering defiled food on my altar. “But you ask, ‘How have we defiled you?’ “By saying that the Lord’s table is contemptible. When you offer blind animals for sacrifice, is that not wrong? When you sacrifice lame or diseased animals, is that not wrong? Try offering them to your governor! Would he be pleased with you? Would he accept you?” says the Lord Almighty. “Now plead with God to be gracious to us. With such offerings from your hands, will he accept you?”—says the Lord Almighty. - Malachi 1:7-9

       

“And when you pray, do not be like the hypocrites, for they love to pray standing in the synagogues and on the street corners to be seen by others. Truly I tell you, they have received their reward in full. But when you pray, go into your room, close the door and pray to your Father, who is unseen. Then your Father, who sees what is done in secret, will reward you. - Matthew 6:5-6

     

 The Pharisee stood by himself and prayed: ‘God, I thank you that I am not like other people—robbers, evildoers, adulterers—or even like this tax collector. I fast twice a week and give a tenth of all I get.’ “But the tax collector stood at a distance. He would not even look up to heaven, but beat his breast and said, ‘God, have mercy on me, a sinner.’ “I tell you that this man, rather than the other, went home justified before God. For all those who exalt themselves will be humbled, and those who humble themselves will be exalted.” - Luke 18:11-14

     

And without faith it is impossible to please God, because anyone who comes to him must believe that he exists and that he rewards those who earnestly seek him. - Hebrews 11:6

     

When you ask, you do not receive, because you ask with wrong motives, that you may spend what you get on your pleasures. - James 4:3