Catena Aurea on Matthew 23:23–24: Gregory the Great

Or otherwise; The gnat stings while it hums; the camel bows its back to receive its load. The Jews then “strained off the gnat,” when they prayed to have the seditious robber released to them; and they swallowed the camel, when they sought with shouts the death of Him who had voluntarily taken on Him the burden of our mortality.