'Three Days' in the Bible

And there they were with David three days eating and drinking: for their brethren prepared for them.

'Choose thee either three years' famishment, or three months to be consumed of thine adversaries, the sword of thine enemies overtaking thee: or else the sword of the LORD three days and pestilence in the land, the angel of the LORD destroying throughout all the coasts of Israel.' And now advise thyself what word I shall bring again unto him that sent me."