Luke 18:7

And God--will not he see that his own People, who cry to him night and day, have justice done them--though he holds his hand?

Matthew 26:44

So he left them, and went away again, and prayed a third time, again saying the same words.

Luke 6:12

Now about that time, Jesus went out, up the hill, to pray, and spent the whole night in prayer to God.

Luke 22:41-46

Then he withdrew about a stone's throw, and knelt down and began to pray.

1 Thessalonians 3:10

Night and day we pray most earnestly that we may see you face to face, and make good any deficiency in your faith.

2 Timothy 1:3

I am thankful to God, whom I serve, as my ancestors did, with a clear conscience, when I remember you, as I never fail to do, in my prayers--night and day alike,

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
Now about that time, Jesus went out, up the hill, to pray, and spent the whole night in prayer to God.
Luke 18:7
And God--will not he see that his own People, who cry to him night and day, have justice done them--though he holds his hand?
Luke 22:41
Then he withdrew about a stone's throw, and knelt down and began to pray.

Am not silent

Matthew 26:44
So he left them, and went away again, and prayed a third time, again saying the same words.