King James Version (KJV)
For it is a pleasant thing if thou keep them within thee; they shall withal be fitted in thy lips.
Modern English
for it will be pleasant if you keep them within you, if all of them are ready on your lips.
Hebrew
כִּֽי נָ֭עִים כִּ֣י תִשְׁמְרֵ֣ם בְּבִטְנֶ֑ךָ יִכֹּנּ֥וּ יַ֝חְדָּ֗ו עַל שְׂפָתֶֽיךָ׃
kiy naʿiym kiy tishmrem bbiṭneka yikonv yaḥdav ʿal shpateyka