וַיֹּ֣אמֶר אֵלַ֔י בֶּן־אָדָ֕ם הֲתִחְיֶ֖ינָה הָעֲצָמ֣וֹת הָאֵ֑לֶּה וָאֹמַ֕ר אֲדֹנָ֥י יְהוִ֖ה אַתָּ֥ה יָדָֽעְתָּ׃
And He said unto me: ‘Son of man, can these bones live?’ And I answered: ‘O Lord GOD, Thou knowest.’
Read kabbalistic (mystical) interpretation of Ezekiel 37:3: and classical mystical sources.