וּשְׁמַרְתֶּ֗ם אֶת־דִּבְרֵי֙ הַבְּרִ֣ית הַזֹּ֔את וַעֲשִׂיתֶ֖ם אֹתָ֑ם לְמַ֣עַן תַּשְׂכִּ֔ילוּ אֵ֖ת כָּל־אֲשֶׁ֥ר תַּעֲשֽׂוּן׃ (פ)
I tak przestrzegajcie słów przymierza tego, i spełniajcie je, aby się wam szczęściło we wszystkiem, co czynić będziecie.
Sefer Chasidim
If you see three generations or more, one after the other, all scholars, but then their children are illiterate, do not say that the words of the scholars are voided because they said, “‘Thy words shall not depart out of thy mouth, nor out of the mouth of thy seed, nor out of the mouth of thy seed’s seed’ (Isa. 59:21), thereafter Torah will no longer cease from among them.” 1Baba Metziah 85a. Behold they have become wedded to a family whose destiny is not to have scholars in its midst,2Midrash Rabbah, ed. Horeb, Ecclesiastes, Chapter IV, p. 91. and our rabbis said, “Most children resemble the mother’s brother therefore their sons are illiterate.” This likewise applies to the God-fearing and the pious, for it written, “and a threefold cord is not quickly broken” (Eccl. 4:12). And if you see that in the fourth generation the God-fearing and pious cease, it is then apparent that they intermarried with those to whom they were not suited, for instance he is not God-fearing or pious, therefore the generation is such. Therefore let a man seek favor each day for himself, his children and grandchildren, that they be joined to a partner who is God-fearing, possesses Torah and deeds of loving kindness,3These three virtues correspond to the “three fold chord” of the verse. for it is said concerning these three “and the threefold cord is not quickly broken.” For the three words, Torah, fearing and loving kindness are all equal numerically, (fear is equal to Torah, and Torah is equal to loving kindness)4Although found in the text it is repetitive, nevertheless we left it but in parenthesis. for concerning “fear” it is written “The fear of the Lord is the beginning of wisdom; a good understanding have all they that do thereafter” (Ps. 111:10). It is not said “to all who study”5Berakoth 17b. but “all they that practice it,” as it is written, “Oh that they had had such a heart as this always, to fear Me” (Deut. 5:26), and it is written, “What doth the Lord, thy God, require of thee but to fear the Lord thy God” (Deut. 10:12). Behold “fear” is prior to “all they that do thereafter” i.e., “The fear” of God and “love …” “to walk in all His ways” (Deut. 10:12). “A good understanding have all they that do thereafter” (Ps. 111:10), “That ye may make all that ye do to prosper” (Deut. 29:8).