'Double Portion' in the Bible

but he shall acknowledge as firstborn the son of the hated, by giving him a double portion of all that is found with him; for he is the firstfruits of his vigour: the right of the firstborn is his.

but to Hannah he used to give a double portion, for he loved Hannah; but Jehovah had shut up her womb.

And it came to pass when they had gone over, that Elijah said to Elisha, Ask what I shall do for thee, before I am taken away from thee. And Elisha said, I pray thee, let a double portion of thy spirit be upon me.