אֶ֚פֶס כִּֽי־עַ֣ז הָעָ֔ם הַיֹּשֵׁ֖ב בָּאָ֑רֶץ וְהֶֽעָרִ֗ים בְּצֻר֤וֹת גְּדֹלֹת֙ מְאֹ֔ד וְגַם־יְלִדֵ֥י הָֽעֲנָ֖ק רָאִ֥ינוּ שָֽׁם׃
Howbeit the people that dwell in the land are fierce, and the cities are fortified, and very great; and moreover we saw the children of Anak there.
Read kabbalistic (mystical) interpretation of Numbers 13:28: and classical mystical sources.