וּמֹשֶׁ֣ה וְאַהֲרֹ֗ן עָשׂ֛וּ אֶת־כָּל־הַמֹּפְתִ֥ים הָאֵ֖לֶּה לִפְנֵ֣י פַרְעֹ֑ה וַיְחַזֵּ֤ק יְהוָה֙ אֶת־לֵ֣ב פַּרְעֹ֔ה וְלֹֽא־שִׁלַּ֥ח אֶת־בְּנֵֽי־יִשְׂרָאֵ֖ל מֵאַרְצֽוֹ׃ (פ)
모세와 아론이 이 모든 기사를 바로 앞에서 행하였으나 여호와께서 바로의 마음을 강퍅케 하셨으므로 그가 이스라엘 자손을 그 나라에서 보내지 아니하였더라
Akeidat Yitzchak
The observation about G-d having hardened the spirit of Sichon King of the Emorites, which was referred to earlier, is to be understood in a similar vein. Sichon, who had observed that Israel seemed to have avoided battling the Moabites or the Edomites and had detoured around their respective countries, concluded that Israel's motive had been fear. Thus he felt encouraged to assume a militant posture. This resulted in his defeat and the conquest of his lands by the Israelites. But there had been no interference with his freedom of choice.