כִּֽי־נָ֭עִים כִּֽי־תִשְׁמְרֵ֣ם בְּבִטְנֶ֑ךָ יִכֹּ֥נוּ יַ֝חְדָּ֗ו עַל־שְׂפָתֶֽיךָ׃
你若將這些話存在腹中，便是美好的事；它們要一同堅立在你的嘴唇上。
Rashi
for it is pleasant It will be [pleasant] for you at a later time if you preserve them and hide them in your innards lest you forget them. Now when will they be preserved in your heart? When they are established on your lips, when you utter them with your mouth.