'Night and Day' in the Bible

They were a wall unto us both by night and day, all the while we were with them keeping the sheep.

That your eyes may be open toward this house night and day, even toward the place of which you have said, My name shall be there: that you may hearken unto the prayer which your servant shall make toward this place.

I the LORD do keep it; I will water it every moment: lest any hurt it, I will keep it night and day.

Therefore you shall say this word unto them; Let my eyes run down with tears night and day, and let them not cease: for the virgin daughter of my people is smitten with a great wound, with a very grievous blow.