'Fiftieth' in the Bible

You shall thus consecrate the fiftieth year and proclaim a release through the land to all its inhabitants. It shall be a jubilee for you, and each of you shall return to his own property, and each of you shall return to his family.

You shall have the fiftieth year as a jubilee; you shall not sow, nor reap its aftergrowth, nor gather in from its untrimmed vines.

In the fiftieth year of Azariah king of Judah, Pekahiah son of Menahem became king over Israel in Samaria, and reigned two years.