וָאָקֻ֥ם בַּבֹּ֛קֶר לְהֵינִ֥יק אֶת־בְּנִ֖י וְהִנֵּה־מֵ֑ת וָאֶתְבּוֹנֵ֤ן אֵלָיו֙ בַּבֹּ֔קֶר וְהִנֵּ֛ה לֹֽא־הָיָ֥ה בְנִ֖י אֲשֶׁ֥ר יָלָֽדְתִּי׃
Ich stand am Morgen auf, meinen Sohn zu säugen, da war er tot. Aber da ich ihn am Morgen betrachtete, war es nicht mein Sohn, den ich geboren hatte.
Tze'enah Ure'enah
“When I awoke in the morning to nurse my son, etc.” [3:21]. When I woke up in the morning, I saw and understood from his face that this is not my son to whom I had given birth.
Rashi
I scrutinized him. I concentrated to scrutinize him.25And therefore I am certain of not making a mistake.