John Gill Commentary 1 Corinthians 9:8

"Do I speak these things after the manner of men? or saith not the law also the same?" — 1 Corinthians 9:8 (ASV)

Say I these things as a man ?
&c.] After the manner of men, reasoning from things common among men, and obvious to everyone's observation:

or says not the law the same also ?
As the subject the apostle is upon was capable of being illustrated and confirmed by instances common unto, and easy of observation among men; so it might be supported by divine authority; it was not only a clear point from the reason of things, but was certain by the law of God.