XXXIII. And the thing speaks for itself, For, as there is a covenant between the Father and the Son; “when thou shalt make his soul (if the soul of the Son shall devote himself) an offering for sin,” Is. 53:10, upon performing the condition, the Son acquired a right to the reward, and so has a merit according to the covenant. Nay, as it is not the obedience of a mere man, but of Christ, God-man, an infinite person, it is also of an infinite value, consequently bears the justest proportion to the greatest corresponding glory; and thus far it is a merit of condignity, as it is called; such as no mere creature is capable to acquiring.

—Herman Witsius, The Economy of the Covenants between God and Man: Comprehending a Complete Body of Divinity, trans. William Crookshank, vol. 1 (London: T. Tegg & Son, 1837), vol. 1. 162 (2.3.33).