Matthew 6:7

And when thou art at prayer, use not vain repetitions, like the heathen: for they imagine that they shall be heard for their much speaking.

Matthew 23:13

Wo unto you, scribes and Pharisees, hypocrites! because ye shut up the kingdom of heaven from men; for ye yourselves enter not in, and those who were coming in, ye suffer not to enter.

Luke 13:25-28

When the master of the family shall have arisen, and shut the door, and ye shall begin to stand without, and to knock at the door, saying, Master, master, open it for us! and he answering will tell you, I know you not whence ye are:

1 Timothy 2:8

I will then that men pray in every place, lifting up holy hands without wrath or doubting:

Treasury of Scripture Knowledge

Summary

And when ye spread forth your hands, I will hide mine eyes from you: yea, when ye make many prayers, I will not hear: your hands are full of blood.

Make many prayers

General references

Bible References

When

Luke 13:25
When the master of the family shall have arisen, and shut the door, and ye shall begin to stand without, and to knock at the door, saying, Master, master, open it for us! and he answering will tell you, I know you not whence ye are:
1 Timothy 2:8
I will then that men pray in every place, lifting up holy hands without wrath or doubting:

Make many prayers

Matthew 6:7
And when thou art at prayer, use not vain repetitions, like the heathen: for they imagine that they shall be heard for their much speaking.
Matthew 23:14
Wo unto you, scribes and Pharisees, hypocrites! for ye devour widows' houses, and for a pretence make long prayers: wherefore ye shall receive greater condemnation.

General references

James 1:7
For let not that man think that he shall receive any thing from the Lord.