욥기 28:6 할라카: Mishneh Torah, Leavened and Unleavened Bread, Shulchan Arukh, Yoreh De'ah & Sefer HaChinukh

And when he finishes searching - if he searched on the night of the fourteenth or on the day of the fourteenth before the sixth hour, he must nullify all of the chametz that remained in his possession and that he does not see. And he should say, "All the chametz that is in my possession that I have not seen - behold it is like dust." But if he searched from the beginning of the sixth hour and onward, he is not able to nullify [it], for it is surely not in his possession - as it is already forbidden to benefit [from it].

All things that if one plants seeds in them they would sprout, they are included in "earth" and one may cover [blood] with them. And if they don't sprout, if they are called "עפר" ("earth") one may cover with them. Therefore, one may cover with dung, and with very fine sand, [fine] enough that the potter doesn't need to crush it at all, and with lime, and with an earthenware shard and brick and barrel stopper of earthenware that was crushed, and with ground stones and ground earthenware shards, and scraps of fine flax, and sawdust, and with food or garments that were burnt until they were made into ash, and with powdered coal, and with stibium, and with millstone dust. But one may not cover with coarse dung, and not with sand that a potter needs to crush, and not with flour and bran-flour, and coarse bran, and not with ground metal if it's not burnt [to ash], except for ground gold which is called "עפר" ("earth"), as it is written "and it has earth of gold". And ash is called "עפר" ("earth"), as it is written "And they should take for the impure from the earth, the burnt [ashes] of the sin-offering".

From the laws of the commandment is, for example, that which they, may their memory be blessed, said (Chullin 83b) that covering of the blood is practiced with every bird and with every animal — whether it was at hand or it was not at hand. “Who hunts” is only stated for what is common, etc. And it is practiced with non-sacred animals, but not with consecrated ones. And it is practiced with the koy, because it is a doubt whether it is a type of animal or beast; but we do not recite a blessing on its covering, due to the doubt. And blood that splattered and that is on the knife is obligated in covering when there is no blood besides it. But if there is any blood besides it, he does not need [to do so], as it is written, “he must cover it with dirt” — its understanding is even some of its blood (Chullin 83b). And the one who covers it must put dirt below and above [it]. And any dirt in the world that is fine enough that a potter does not need to pound it, is fitting to cover [it] (Chullin 28a). And likewise, we [may] cover with all that is called dirt — even though it is not actually dirt, such as shaved gold, which is called dirt (dust), as it is stated (Job 28:6), “and it has gold dirt.” And one who saw his fellow slaughter but not cover is obligated to cover; as it is stated about this commandment (Leviticus 17:14), “and I say to the Children of Israel” — and they, may their memory be blessed, elucidated, “This commandment is to all of the Children of Israel” (Chullin 86-87a). And the rest of its details are in Chullin in the chapter [entitled] Kisui Hadam. (See Tur, Yoreh Deah 28.)