Or HaChaim on Numbers 17:28/אור החיים על במדבר י״ז:כ״ח

1 כל הקרב הקרב..ימות, "Anyone that comes near..that comes near will die." Only now did the message penetrate the average Israelite's head although they had been informed about this previously. This is remindful of a proverb cited in Shir Hashirim Rabbah on the verse (Song of Songs, 1,2: "May he kiss me with the kisses of his mouth." The proverb says that if one slaughters an animal one will suffer terrible pain."