'Vigour' in the Bible

Reuben, thou art my firstborn, My might, and the firstfruits of my vigour: Excellency of dignity, and excellency of strength.

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.

And the man of thine whom I shall not cut off from mine altar, shall be to cause thine eyes to fail and to grieve thy soul; and all the increase of thy house shall die in their vigour.

For he hath covered his face with his fat, And maketh vigour over his confidence.

Yea, whereto should the strength of their hands profit me, men in whom vigour hath perished?

And he smote all the firstborn in Egypt, the first-fruits of their vigour in the tents of Ham.

And he smote every firstborn in their land, the firstfruits of all their vigour.