מִפְּנֵ֤י שֵׂיבָה֙ תָּק֔וּם וְהָדַרְתָּ֖ פְּנֵ֣י זָקֵ֑ן וְיָרֵ֥אתָ מֵּאֱלֹהֶ֖יךָ אֲנִ֥י יְהוָֽה׃ (פ)
Thou shalt rise up before the hoary head, and honour the face of the old man, and thou shalt fear thy God: I am the LORD.
Read kabbalistic (mystical) interpretation of Leviticus 19:32: and classical mystical sources.