Luke 2:21

Should be circumcised; which might be done not only in the temple, or in a synagogue, but in any house. (Witham) --- Many reasons may be alleged why our Saviour submitted to the painful and humbling knife of circumcision: 1. to manifest to the whole world the reality of his human nature, and the difference between his divinity and humanity; 2. to shew he approved of circumcision, which he had instituted; 3. to prove that he was of the seed of Abraham; 4. to teach us humility and obedience, by observing the law to which he was not bound; 5. that by receiving the burthen of the law, he might free those that were under the law, (Galatians iii.); and lastly, that the Jews might have no excuse for rejecting him, because he was uncircumcised. (St. Epiphanius and Nicholas of Lyra)