Parashas Shemos · Side page (no TT primary unit)
וָאֹמַ֣ר אֵלֶ֗יךָ שַׁלַּ֤ח אֶת־בְּנִי֙ וְיַֽעַבְדֵ֔נִי וַתְּמָאֵ֖ן לְשַׁלְּח֑וֹ הִנֵּה֙ אָנֹכִ֣י הֹרֵ֔ג אֶת־בִּנְךָ֖ בְּכֹרֶֽךָ׃
I have said to you, “Let My son go, that he may worship Me,” yet you refuse to let him go. Now I will slay your first-born son.’”
Shemos Rabbah 5:7 — EXTRA.
הנה אנכי הרג —\ldots גזירה היא מלפני.
English: “Behold, I will kill” — \ldots it is a decree from before Me.
Custom
Chazal present the threat against Pharaoh’s firstborn as a fixed decree announced at the outset.