'Old' in the Bible

Nicodemus saith unto him, 'How is a man able to be born, being old? is he able into the womb of his mother a second time to enter, and to be born?'

The Jews, therefore, said unto him, 'Thou art not yet fifty years old, and Abraham hast thou seen?'

verily, verily, I say to thee, When thou wast younger, thou wast girding thyself and wast walking whither thou didst will, but when thou mayest be old, thou shalt stretch forth thy hands, and another will gird thee, and shall carry thee whither thou dost not will;'