'Widow' in the Bible

“Teacher, Moses wrote for us [a law] that if a man’s brother dies and leaves a wife but leaves no child, his brother is to marry the widow and raise up children for his brother.

A poor widow came and put in two small copper coins, which amount to a mite.

Calling His disciples to Him, He said to them, “I assure you and most solemnly say to you, this poor widow put in [proportionally] more than all the contributors to the treasury.