on denotes strength or capacity, expressed in bodily power and in firstborn language.

The attested usage centers on strength or capacity: it describes bodily power, the power by which the heavenly host is sustained, and the strength connected with a firstborn son.

1. Strength, power, or capacity · dominant

   Construct forms occur in firstborn clauses: in Genesis 49:3 the APB renders Reuben as both the speaker's firstborn and “my strength,” while Deuteronomy 21:17 calls the firstborn “the first of his strength.” The term also occurs with bodily and sustaining power: in Job 40:16 the APB renders strength in the loins and belly muscles, and Isaiah 40:26 describes the creator as strong in power so that none of the host is missing.

   Genesis 49:3Deuteronomy 21:17Psalm 105:36Job 40:16Isaiah 40:26Isaiah 40:29

In the Anselm Project Bible: The APB commonly presents the relevant clauses with “strength,” including firstborn and bodily contexts; Isaiah 40:26 and Isaiah 40:29 also use “power” and “might.” These English terms show the verse-level presentation rather than fixed individual renderings.