לֹ֣א אִ֥ישׁ אֵל֙ וִֽיכַזֵּ֔ב וּבֶן־אָדָ֖ם וְיִתְנֶחָ֑ם הַה֤וּא אָמַר֙ וְלֹ֣א יַעֲשֶׂ֔ה וְדִבֶּ֖ר וְלֹ֥א יְקִימֶֽנָּה׃
God is not a man, that He should lie; Neither the son of man, that He should repent: When He hath said, will He not do it? Or when He hath spoken, will He not make it good?
Read kabbalistic (mystical) interpretation of Numbers 23:19: and classical mystical sources.