וַֽ֠יְהִי בְּאַחַ֨ת וְשֵׁשׁ־מֵא֜וֹת שָׁנָ֗ה בָּֽרִאשׁוֹן֙ בְּאֶחָ֣ד לַחֹ֔דֶשׁ חָֽרְב֥וּ הַמַּ֖יִם מֵעַ֣ל הָאָ֑רֶץ וַיָּ֤סַר נֹ֙חַ֙ אֶת־מִכְסֵ֣ה הַתֵּבָ֔ה וַיַּ֕רְא וְהִנֵּ֥ה חָֽרְב֖וּ פְּנֵ֥י הָֽאֲדָמָֽה׃
육백일년 정월 곧 그 달 일일에 지면에 물이 걷힌지라 노아가 방주 뚜껑을 제치고 본즉 지면에 물이 걷혔더니
Rashi on Genesis
בראשׂון IN THE FIRST MONTH — According to R. Eliezer this would be Tishri, and according to R. Joshua Nisan (Rosh Hashanah 11b).
Sforno on Genesis
ויסר נח את מכסה התבה, he had thought that the earth had already dried out completely only to find
Radak on Genesis
[Began] to dry. It was still like mud, dry on the surface but soft underneath. Noach knew that Hashem would tell them when it was safe to go out.