וּשְׁאָ֥ר עֵ֛ץ יַעְר֖וֹ מִסְפָּ֣ר יִֽהְי֑וּ וְנַ֖עַר יִכְתְּבֵֽם׃ (פ)
And the remnant of the trees of his forest shall be few, That a child may write them down.
Read kabbalistic (mystical) interpretation of Isaiah 10:19: and classical mystical sources.