Luke 18:7

and will not God avenge his own elect, who cry to him night and day? will he delay their cause?

Matthew 26:44

then he left them once more, and went to prayers the third time, using the same words.

Luke 6:12

About that time, Jesus retired to a mountain to pray, and spent the whole night in an oratory.

Luke 22:41-46

At length he withdrew from them about a stone's cast, where falling upon his knees,

1 Thessalonians 3:10

whilst night and day we make our ardent requests to him, that we may once more be present with you, that nothing may be wanting to the perfection of your faith?

2 Timothy 1:3

When I remember you, as I continually do in my prayers night and day, I give thanks to God, whom I serve with a pure conscience, after the example of my fore-fathers.

Treasury of Scripture Knowledge

Summary

O my God, I cry in the daytime, but thou hearest not; and in the night season, and am not silent.

Am not silent

Bible References

In the night

Luke 6:12
About that time, Jesus retired to a mountain to pray, and spent the whole night in an oratory.
Luke 18:7
and will not God avenge his own elect, who cry to him night and day? will he delay their cause?
Luke 22:41
At length he withdrew from them about a stone's cast, where falling upon his knees,

Am not silent

Matthew 26:44
then he left them once more, and went to prayers the third time, using the same words.