Reference for Exodus 7:13

וַיֶּחֱזַק֙ לֵ֣ב פַּרְעֹ֔ה וְלֹ֥א שָׁמַ֖ע אֲלֵהֶ֑ם כַּאֲשֶׁ֖ר דִּבֶּ֥ר יְהוָֽה׃ (פ)

And Pharaoh’s heart was hardened, and he hearkened not unto them; as the LORD had spoken.

BDB

BDB