If you have read, you have not repeated, and if you have repeated, you have not revised for the third time
If you studied, you probably did not review or repeat your learning, and if you reviewed it once, you likely did not review it a third time. Figuratively: You did not study thoroughly enough or did not deeply understand what you learned. An expression said about someone to imply that they apparently did not review the material enough and therefore made a mistake.
(He said to him: as it is written (Proverbs 1) 'Wisdom cries aloud in the street.' He said to him: If you have read, you have not repeated; if you have repeated, you have not revised a third time; if you revised a third time, it was not explained to you. 'Wisdom cries aloud in the street'—like Rava said: Whoever studies Torah inside, his Torah proclaims him outside.—Moed Katan 16b. And also: 'If the reader asks me... I too will answer... if you have read, you have not repeated; if you have repeated, you have not revised a third time; if you revised a third time, it was not explained to you.'—Berdyczewski, Writings, II, 80. And also: 'If you have read, you have not repeated; if you have repeated, you have not revised a third time; if you revised a third time, it was not explained to you. And the explanation of the Torah is not given to the common people but to scholars.'—Haim Sabato, Ke'Af'afei Shachar, 54)
Translation
Expression (Hebrew)
אִם קָרִיתָ לֹא שָׁנִיתָ וְאִם שָׁנִיתָ לֹא שִׁלַּשְׁתָּ
Definition (Hebrew)
אִם לָמַדְתָּ, כַּנִּרְאֶה לֹא שִׁנַּנְתָּ וְלֹא חָזַרְתָּ עַל הַלִּמּוּד, וְאִם חָזַרְתָּ עָלָיו פַּעַם אַחַת, כַּנִּרְאֶה לֹא חָזַרְתָּ עָלָיו פַּעַם שְׁלִישִׁית. בְּהַשְׁאָלָה: לֹא לָמַדְתָּ מַסְפִּיק טוֹב אוֹ לֹא הֵבַנְתָּ לָעֹמֶק אֶת מַה שֶׁלָּמַדְתָּ בִּגְלַל שֶׁלֹּא חָזַרְתָּ עַל הַחֹמֶר הַלִּמּוּדִי.
("אָמַר לֵהּ: דכתיב (מִשְׁלֵי א)חכמות בַּחוּץ תרונה. אָמַר לֵהּ: אִם קָרִיתָ - לֹא שָׁנִיתָ, וְאִם שָׁנִיתָ - לֹא שילשת, וְאִם שילשת- לֹא פירשו לָךְ. חכמות בַּחוּץ תרנה- כדרבא. דְּאָמַר רבא: כָּל הָעוֹסֵק בַּתּוֹרָה מִבִּפְנִים- תורתו מכרזת עָלָיו מִבַּחוּץ"- מוֹעֵד קָטָן טז ע"ב, וְכֵן:"וְאִם ישאלנו הַקּוֹרֵא...אַף אֲנִי אֶעֱנֶה...אִם קָרִיתָ לֹא שָׁנִיתָ,וְאִם שָׁנִיתָ לֹא שילשת,וְאִם שילשת לֹא פירשו לָךְ"- בֶּרְדִּיצֶ'בְסְקִי/ כְּתָבִים,ב,80, וְכֵן:"אִם קָרִיתָ לֹא שָׁנִיתָ ,וְאִם שָׁנִיתָ לֹא שילשת, וְאִם שילשת לֹא פירשו לָךְ, ופירוש הַתּוֹרָה לֹא נִתָּן לעמי אֲרָצוֹת אֶלָּא לְתַלְמִידֵי חֲכָמִים"-חַיִּים סָבָתוֹ/ כְּעַפְעַפֵּי שַׁחַר, 54)