Targum Jonathan on Genesis
Kings shall not cease, nor rulers, from the house of Jehuda, nor sapherim teaching the law from his seed, till the time that the King the Meshiha, shall come, the youngest of his sons; and on account of him shall the peoples flow together.
Targum Jerusalem
Kings shall not cease from the house of Jehuda, nor sapherim teaching the law from his children's children, until the time that the King Meshiha shall come, whose is the kingdom, and to whom all the kingdoms of the earth shall be obedient.