רַק הִשָּׁמֶר לְךָ וּשְׁמֹר נַפְשְׁךָ מְאֹד פֶּן־תִּשְׁכַּח אֶת־הַדְּבָרִים אֲשֶׁר־רָאוּ עֵינֶיךָ וּפֶן־יָסוּרוּ מִלְּבָבְךָ כֹּל יְמֵי חַיֶּיךָ וְהוֹדַעְתָּם לְבָנֶיךָ וְלִבְנֵי בָנֶיךָ ׃

Only take heed to thyself, and keep thy soul diligently, lest thou forget the things which thine eyes saw, and lest they depart from thy heart all the days of thy life; but make them known unto thy children and thy children’s children;

Tanakh — Devarim (Deuteronomy) 4:9▶