'Third' in the Bible

And it came to pass on the third day, that behold, a man came out of the camp from Saul with his garments rent, and earth upon his head; and as soon as he came to David, he fell to the earth and did obeisance.

and his second, Chileab, of Abigail the wife of Nabal the Carmelite; and the third, Absalom the son of Maachah, daughter of Talmai king of Geshur;

And David sent forth the people, a third part under the hand of Joab, and a third part under the hand of Abishai the son of Zeruiah, Joab's brother, and a third part under the hand of Ittai the Gittite. And the king said to the people, I will surely go forth with you myself also.