Musar su Proverbi 25:4

His table and his bed shall be clean and all things that pertain to him shall be clean. His own body or person shall be clean not loathesome and he should be careful to wash his face, hands and feet and all his body at frequent times. As we find that "When Hillel the elder took leave of his disciples they said to him, 'Whither you go?' And he said to them, 'To fulfill a precept!' Then they asked him. 'Which precept is Hillel about to fulfill?' He said to them, 'To bathe in the bathhouse.' They asked, 'Is this a precept?' He said to them, 'Yes! If you consider that the statues of kings which are set up in theatres and circuses are scrubbed and cleaned by the one delegated to this task, and this man receives sustenance for this and is among the honored men of the kingdom, should we who are created in the image of God (Gen. 9:6) have less regard for our bodies?' " (Leviticus Rabbah 34:3).

He who loans money to his companion and the borrower comes to pay him silver by weight, if the lender does not know the accuracy of the scale and the justness of the balance or if he knows everything about the scale, but does not know the properties of silver, then he is very near to being injured in the matter of weight and money, for at times he will refuse the silver and take the dross, or he may take less than the weight which is properly his, for if he takes too light a weight or puts the silver on the heavy side of the scale, through all of these types of ignorance he is bound to make an error. Or even if he is an expert in recognizing silver and in weighing it, if he does not look at it as carefully as he should then it is possible that dross will be mixed in with his silver. But if he is an expert in all things, in weighing, and in recognizing silver and he looks at it as he should, then he will be paid as he should be, with pure silver and complete weight. Therefore, he has compared the "tongue of the righteous" to "the best of silver." For the righteous man must recognize the good and the bad and should know all of the qualities, and he should look and examine them as is proper, and he must exert his body and his wisdom to leave off folly and to take hold of understanding and to remove the mixtures of dross from himself. Then will his soul be purged and purified before God, as it is written: "Take away the dross from the silver, and there cometh forth a vessel for the refiner" (Prov. 25:4). When the dross is removed then the vessel is purged.