וּבְקָֽרְךָ֤ וְצֹֽאנְךָ֙ יִרְבְּיֻ֔ן וְכֶ֥סֶף וְזָהָ֖ב יִרְבֶּה־לָּ֑ךְ וְכֹ֥ל אֲשֶׁר־לְךָ֖ יִרְבֶּֽה׃
and when thy herds and thy flocks multiply, and thy silver and thy gold is multiplied, and all that thou hast is multiplied;
Read kabbalistic (mystical) interpretation of Deuteronomy 8:13: and classical mystical sources.