'Right hand' in the Bible

And Israel stretched out his right hand and put [it] on the head of Ephraim (now he was the younger), and his left hand on the head of Manasseh, crossing his hands, for Manasseh [was] the firstborn.

When Joseph saw that his father put his right hand on the head of Ephraim, he was displeased. And he took hold of his father's hand to remove it from the head of Ephraim [over] to the head of Manasseh.

And Joseph said to his father, "Not so, my father; because this one [is] the firstborn. Put your right [hand] upon his head."