Job 14:16

For now thou numberest my steps: dost thou not watch over my sin?

God numbers a person's steps, keeping a precise count of every movement of life. He watches over sin with close attention, recording wrongdoing and sealing up transgression as if bound in a bag to be kept secure. In this setting that sealing means laying up sins for future reckoning, and for Israel it is sins stored up for judgment and recompense.