'Fiftieth' in the Bible

And ye shall hallow the year of the fiftieth year, and proclaim liberty in the land unto all the inhabitants thereof; a year of jubilee shall it be unto you, and ye shall return every man unto his possession, and ye shall return every man unto his family;

a year of jubilee shall that fiftieth year be unto you: ye shall not sow, neither reap its aftergrowth, nor gather the fruit of its undressed vines.

In the fiftieth year of Azariah king of Judah, Pekahiah the son of Menahem began to reign over Israel in Samaria, for two years.