Targum for Exodus 9:35
וַֽיֶּחֱזַק֙ לֵ֣ב פַּרְעֹ֔ה וְלֹ֥א שִׁלַּ֖ח אֶת־בְּנֵ֣י יִשְׂרָאֵ֑ל כַּאֲשֶׁ֛ר דִּבֶּ֥ר יְהוָ֖ה בְּיַד־מֹשֶֽׁה׃ (פ)
And the heart of Pharaoh was hardened, and he did not let the children of Israel go; as the LORD had spoken by Moses.
Targum Jonathan on Exodus
And Pharoh's heart was made obstinate, and he would not release the children of Israel, as the Lord had said through Mosheh.
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