If his loins have not blessed me, and if he were not warmed with the fleece of my sheep; If his loins have not blessed me - This is a very delicate touch: the part that was cold and shivering is now covered with warm woollen. It feels the comfort; and by a fine prosopopoeia, is represented as blessing him who furnished the clothing.
Related Commentaries of Job 31:20
Job 31:20
20 If his loins have not blessed me, and if he were not warmed with the fleece of my sheep;