וְכַֽאֲשֶׁר֙ יֹאמְר֣וּ אֵלֶ֔יךָ בְּנֵ֥י עַמְּךָ֖ לֵאמֹ֑ר הֲלֽוֹא־תַגִּ֥יד לָ֖נוּ מָה־אֵ֥לֶּה לָּֽךְ׃
And when the children of thy people shall speak unto thee, saying: Wilt thou not tell us what thou meanest by these?
Read kabbalistic (mystical) interpretation of Ezekiel 37:18: and classical mystical sources.