וַיַּ֨רְא יִשְׂרָאֵ֜ל אֶת־הַיָּ֣ד הַגְּדֹלָ֗ה אֲשֶׁ֨ר עָשָׂ֤ה יְהוָה֙ בְּמִצְרַ֔יִם וַיִּֽירְא֥וּ הָעָ֖ם אֶת־יְהוָ֑ה וַיַּֽאֲמִ֙ינוּ֙ בַּֽיהוָ֔ה וּבְמֹשֶׁ֖ה עַבְדּֽוֹ׃ (פ)
以色列人看見永恆者在埃及人身上所施展的大能之手，百姓就敬畏永恆者，又信了永恆者和祂的僕人摩西。
Derashot HaRan
But there is a question here, for after the splitting of the Red Sea we find it written (Ibid 14:31): "And they believed in the L-rd and in Moses, His servant," the implication being that before this their belief was not perfect.