'Fifth' in the Bible

And there was evening, and there was morning a fifth day.

And God hearkened to Leah, and she conceived, and bore Jacob a fifth son.

Let Pharaoh do this: let him appoint overseers over the land, and take the fifth part of the land of Egypt during the seven years of plenty,

And it shall come to pass in the increase that ye shall give the fifth to Pharaoh, and the four parts shall be your own, for seed of the field, and for your food, and for them of your households, and for food for your little ones.

And Joseph made it a law over the land of Egypt to this day, that the fifth should be for Pharaoh, except the land of the priests: theirs alone did not become Pharaoh's.