Luke 2:37

and herself a widow up to eighty-four years; who did not depart from the temple, serving night and day with fastings and prayers;

1 Timothy 5:5

Now she who is a widow indeed, and is left alone, has put her hope in God, and continues in supplications and prayers night and day.

Acts 14:23

And having chosen them elders in each assembly, having prayed with fastings, they committed them to the Lord, on whom they had believed.

Exodus 38:8

And he made the laver of copper, and its stand of copper, of the mirrors of the crowds of women who crowded before the entrance of the tent of meeting.

1 Samuel 2:2

There is none holy as Jehovah, for there is none beside thee, neither is there any rock like our God.

Psalm 22:2

My God, I cry by day, and thou answerest not; and by night, and there is no rest for me:

Psalm 23:6

Surely, goodness and loving-kindness shall follow me all the days of my life; and I will dwell in the house of Jehovah for the length of the days.

Psalm 27:4

One thing have I asked of Jehovah, that will I seek after: that I may dwell in the house of Jehovah all the days of my life, to behold the beauty of Jehovah, and to inquire of him in his temple.

Psalm 84:4

Blessed are they that dwell in thy house: they will be constantly praising thee. Selah.

Psalm 84:10

For a day in thy courts is better than a thousand. I had rather stand at the threshold of the house of my God, than dwell in the tents of wickedness.

Psalm 92:13

Those that are planted in the house of Jehovah shall flourish in the courts of our God:

Psalm 135:1-2

Hallelujah! Praise the name of Jehovah; praise, ye servants of Jehovah,

Luke 5:33

And they said to him, Why do the disciples of John fast often and make supplications, in like manner those also of the Pharisees, but thine eat and drink?

Acts 13:3

Then, having fasted and prayed, and having laid their hands on them, they let them go.

Acts 26:7

to which our whole twelve tribes serving incessantly day and night hope to arrive; about which hope, O king, I am accused of the Jews.

Revelation 3:12

He that overcomes, him will I make a pillar in the temple of my God, and he shall go no more at all out; and I will write upon him the name of my God, and the name of the city of my God, the new Jerusalem, which comes down out of heaven, from my God, and my new name.

Revelation 7:15

Therefore are they before the throne of God, and serve him day and night in his temple, and he that sits upon the throne shall spread his tabernacle over 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.

General references

Bible References

But

Psalm 22:2
My God, I cry by day, and thou answerest not; and by night, and there is no rest for me:
Acts 26:7
to which our whole twelve tribes serving incessantly day and night hope to arrive; about which hope, O king, I am accused of the Jews.
1 Timothy 5:5
Now she who is a widow indeed, and is left alone, has put her hope in God, and continues in supplications and prayers night and day.
Revelation 7:15
Therefore are they before the throne of God, and serve him day and night in his temple, and he that sits upon the throne shall spread his tabernacle over them.

General references

Numbers 30:9
But the vow of a widow, and of her that is divorced, everything wherewith she hath bound her soul shall stand against her.