וַיִּקַּ֨ח מֹשֶׁ֜ה וְאֶלְעָזָ֧ר הַכֹּהֵ֛ן אֶת־הַזָּהָ֖ב מֵֽאִתָּ֑ם כֹּ֖ל כְּלִ֥י מַעֲשֶֽׂה׃
And Moses and Eleazar the priest took the gold of them, even all wrought jewels.
Read kabbalistic (mystical) interpretation of Numbers 31:51: and classical mystical sources.