Matthew 6:7

And when you pray, do not use empty repetitions as the Gentiles do. For they think that they will be heard for their many words.

Romans 1:21

for although they knew God they did not honor him as God or give thanks to him, but they became futile in their thinking, and their foolish hearts were darkened.

1 Peter 1:18

You know that you were redeemed from the futile way of life inherited from your forefathers, not with perishable things such as silver or gold,

Treasury of Scripture Knowledge

Summary

For the customs of the people are vain: for one cutteth a tree out of the forest, the work of the hands of the workman, with the axe.

General references

Bible References

Customs

Matthew 6:7
And when you pray, do not use empty repetitions as the Gentiles do. For they think that they will be heard for their many words.
Romans 1:21
for although they knew God they did not honor him as God or give thanks to him, but they became futile in their thinking, and their foolish hearts were darkened.
1 Peter 1:18
You know that you were redeemed from the futile way of life inherited from your forefathers, not with perishable things such as silver or gold,

General references

Acts 16:21
They advocate customs which it is not lawful for us Romans to accept or practice."