3. Mose 19:35

As a universal rule, they were to do no wrong in judgment (the administration of justice, Lev 19:15), or in social intercourse and trade with weights and measures of length and capacity; but to keep just scales, weights, and measures. On ephah and hin, see at Exo 16:36 and Exo 29:40. In the renewal of this command in Deu 25:13-16, it is forbidden to carry "stone and stone" in the bag, i.e., two kinds of stones (namely, for weights), large and small; or to keep two kinds of measures, a large one for buying and a small one for selling; and full (unadulterated) and just weight and measure are laid down as an obligation. This was a command, the breach of which was frequently condemned (Pro 16:11; Pro 20:10, Pro 20:23; Amo 8:5; Mic 6:10, cf. Eze 45:10).

Some ceremonial precepts there are in this chapter, but most of them are moral. One would wonder that when some of the lighter matters of the law are greatly enlarged upon (witness two long chapters concerning the leprosy) many of the weightier matters are put into a little compass: divers of the single verses of this chapter contain whole laws concerning judgment and mercy; for these are things which are manifest in every man's conscience; men's own thoughts are able to explain these, and to comment upon them. I. The laws of this chapter, which were peculiar to the Jews, are, 1. Concerning their peace-offerings (Lev 19:5-8). 2. Concerning the gleanings of their fields (Lev 19:9, Lev 19:10). 3. Against mixtures of their cattle, seed, and cloth (Lev 19:19). 4. Concerning their trees (Lev 19:23-25). 5. Against some superstitious usages (Lev 19:26-28). But, II. Most of these precepts are binding on us, for they are expositions of most of the ten commandments. 1. Here is the preface to the ten commandments, "I am the Lord," repeated fifteen times. 2. A sum of the ten commandments. All the first table in this, "Be you holy," (Lev 19:2). All the second table in this, "Thou shalt love thy neighbour" (Lev 19:18), and an answer to the question, "Who is my neighbour?" (Lev 19:33, Lev 19:34). 3. Something of each commandment. (1.) The first commandment implied in that which is often repeated here, "I am your God." And here is a prohibition of enchantment (Lev 19:26) and witchcraft (Lev 19:31), which make a god of the devil. (2.) Idolatry, against the second commandment, is forbidden, (Lev 19:4). (3.) Profanation of God's name, against the third (Lev 19:12). (4.) Sabbath-sanctification is pressed (Lev 19:3, Lev 19:30). (5.) Children are required to honour their parents (Lev 19:3),…

19:35-36 dishonest standards: Merchants would sometimes use two different sets of weights, one heavy and one light (Deut 25:13-15), in order to cheat customers. The Bible makes it clear that this practice was abhorrent to God (Prov 11:1; 16:11; 20:10, 23; Mic 6:11).