To circumcise — the covenant's sign cut into the flesh (17:10-14), at eight days old, house-born and money-bought alike; the male who refuses the cutting is himself 'cut off' (karet) — the penalty rhymes with the refusal. ⭐ Deuteronomy 10:16 aims the same blunt verb, with the same blunt noun — orlat levavkhem, the foreskin of your heart — at an internal organ, and the Hebrew softens nothing: it attaches the two words and leaves the reader to do the work. The exact phrase stands once in the Hebrew Bible. ⚠ Three passages ask for a circumcised heart and each puts the knife in a different hand: here the people are told to do it; Jeremiah 4:4 has them circumcise themselves and REMOVE the foreskins, plural; and Deuteronomy 30:6 (neither yet on these pages) has Jehovah do it to them. Deuteronomy holds the command and the promise both, twenty chapters apart, without deciding between them. → first discussed at Gen 17:10