'Generation' in the Bible

And Jehovah saith unto Jehu, 'Because that thou hast done well, to do that which is right in Mine eyes -- according to all that is in My heart thou hast done to the house of Ahab -- the sons of the fourth generation do sit for thee on the throne of Israel.'

It is the word of Jehovah that He spake unto Jehu, saying, 'Sons of the fourth generation do sit for thee on the throne of Israel;' and it is so.