Luke 2:37

and she had been a widow until she was now eighty-four. She never left the Temple, but worshipped night and day with fasting and prayer.

1 Timothy 5:5

But a woman who is really a widow, and has no children, has fixed her hope on God, and devotes herself to prayers and entreaties night and day.

Acts 14:23

They appointed elders for them in each church, and with prayer and fasting they committed them to the Lord in whom they had believed.

Luke 5:33

They said to him, "John's disciples observe frequent fasts and offer prayers, and so do the disciples of the Pharisees, but your disciples eat and drink."

Acts 13:3

So after fasting and prayer, they laid their hands upon them and let them go.

Acts 26:7

the promise in the hope of seeing which fulfilled our twelve tribes serve God zealously night and day. It is about this hope, your Majesty, that I am accused by some Jews.

Revelation 3:12

I will make him who is victorious a pillar in the temple of my God; he shall never go out of it again. I will write on him the name of my God and the name of the city of my God??he new Jerusalem, which is to come down out of heaven from my God??nd my new name.

Revelation 7:15

That is why they are before the throne of God, and serve him day and night in his temple, and he who is seated on the throne will shelter them.

Treasury of Scripture Knowledge

Summary

And she was a widow of about fourscore and four years, which departed not from the temple, but served God with fastings and prayers night and day.

Bible References

But

Acts 26:7
the promise in the hope of seeing which fulfilled our twelve tribes serve God zealously night and day. It is about this hope, your Majesty, that I am accused by some Jews.
1 Timothy 5:5
But a woman who is really a widow, and has no children, has fixed her hope on God, and devotes herself to prayers and entreaties night and day.
Revelation 7:15
That is why they are before the throne of God, and serve him day and night in his temple, and he who is seated on the throne will shelter them.