'Loins' in the Bible

The bands of kings He hath opened, And He bindeth a girdle on their loins.

If his loins have not blessed me, And from the fleece of my sheep He doth not warm himself,

Gird, I pray thee, as a man, thy loins, And I ask thee, and cause thou Me to know.

Gird, I pray thee, as a man, thy loins, I ask thee, and cause thou Me to know.

Lo, I pray thee, his power is in his loins, And his strength in the muscles of his belly.