Do Not Subtract from the Commandments
The Mirror of Addition — Subtraction Defined
Deuteronomy 4:2: “You shall not add to the word that I command you, nor take from it.” The prohibition on subtracting (lo tigre’u) is the exact mirror of the prohibition on adding (#379). Where addition claims to complete or supplement the divine word, subtraction claims to simplify or reduce it. Both violations treat the Torah as a human product that can be improved — by expansion or contraction. Both deny the completeness of what was given at Sinai. The same verse prohibits both simultaneously, establishing them as two expressions of the same fundamental error.
Rambam (Hilkhot Mamrim 2:9) identifies two categories of subtraction. The first is when a court or individual removes one of the Torah’s 613 commandments and declares it no longer binding. The second is when a court presents its own rulings as if they were Torah commandments — not creating new commandments but claiming Torah authority for rabbinic enactments. The second category blurs the distinction between Torah and rabbinic law, effectively “subtracting” from the Torah by collapsing the two levels. The Sadducees’ rejection of the oral law is the classic historical expression: by accepting only the written Torah, they effectively subtracted the oral tradition that the Pharisees held had been given at Sinai alongside the written text.
Ahaz and the Bronze Altar — Removing the Covenant Forms
2 Kings 16:10–16: King Ahaz went to Damascus to meet the Assyrian king Tiglath-pileser. He saw the altar there and sent a detailed description to Uriah the priest in Jerusalem, who built a replica. When Ahaz returned, he offered sacrifices on the new altar and then moved the bronze altar of the LORD from its place in front of the Temple: “King Ahaz commanded Uriah the priest, saying: ‘On the great altar burn the morning burnt offering’... and the bronze altar shall be for me to inquire by.” He did not eliminate the bronze altar but demoted it — making it secondary to the Assyrian replica.
2 Kings 16:17–18: Ahaz then cut off the borders of the stands, removed the laver from them, took down the sea from the bronze oxen and placed it on a stone base, and “the covered way for the Sabbath that had been built inside the palace and the outer entrance for the king he removed from the house of the LORD, on account of the king of Assyria.” Each removal was a piece of the Solomonic Temple’s structure, removed in deference to Assyrian political demands. This is commandment #380 in its political expression: the covenant forms of worship being reduced and replaced in response to external pressure. Ahaz subtracted from the Temple’s sanctioned structure without eliminating worship entirely — the subtraction was partial and instrumentalized.
The Fixed Structure — Why 613 Is the Complete Count
The tradition that the Torah contains exactly 613 commandments is ancient. The Talmud (Makkot 23b) attributes it to Rabbi Simlai: “613 commandments were communicated to Moses — 365 negative commandments corresponding to the number of days in the solar year, and 248 positive commandments corresponding to the number of limbs in the human body.” Rambam’s Sefer HaMitzvot exists precisely to enumerate and justify this count. The Sefer HaMitzvot opens with a discussion of why certain categories are included and others excluded — a recognition that the count is not obvious from the text alone but requires principled derivation.
The prohibitions on adding (#379) and subtracting (#380) are what makes the count meaningful: it is not a coincidence or a summary but the fixed and complete structure of the covenant’s demands. Deuteronomy 12:32: “Everything that I command you, you shall be careful to do. You shall not add to it or take from it.” A second formulation of the same prohibition appears here in the context of the laws for the chosen worship place — reinforcing that the prohibition applies specifically in the domain of religious practice where the temptation to add or subtract is strongest. The number 613 is the legal expression of the sealed word: “It is not in heaven” (Deut 30:12) — the Torah has come down, been given, been counted. The structure is complete.
- Ahaz king of Judah — 2 Kgs 16:10–18: dismantled Solomonic Temple structures and demoted the bronze altar to secondary status in deference to Assyrian political demands. The paradigm of commandment #380: religious subtraction driven by external political pressure.
- The Sadducees — rejected the oral law as a rabbinic addition rather than a Sinaitic given. The Pharisaic tradition classified this as subtraction from what was given at Sinai. Rambam (Hilkhot Mamrim 1:1) identifies rejection of the oral tradition as the core violation of commandment #380.
- Rabbi Simlai (Makkot 23b) — articulated the tradition that 613 commandments were given to Moses, 365 negative corresponding to solar year days and 248 positive corresponding to the body’s limbs. The enumeration is the legal expression of the sealed structure that commandments #379 and #380 protect.
Read the source passage in the Torah reader.
Read in the Torah Reader — Deuteronomy 4:2