וַיֵּ֨צְא֜וּ נֹגְשֵׂ֤י הָעָם֙ וְשֹׁ֣טְרָ֔יו וַיֹּאמְר֥וּ אֶל־הָעָ֖ם לֵאמֹ֑ר כֹּ֚ה אָמַ֣ר פַּרְעֹ֔ה אֵינֶ֛נִּי נֹתֵ֥ן לָכֶ֖ם תֶּֽבֶן׃
And the taskmasters of the people went out, and their officers, and they spoke to the people, saying: ‘Thus saith Pharaoh: I will not give you straw.
Read kabbalistic (mystical) interpretation of Exodus 5:10: and classical mystical sources.