וַיְהִ֗י כַּאֲשֶׁ֨ר כִּלָּ֣ה יִצְחָק֮ לְבָרֵ֣ךְ אֶֽת־יַעֲקֹב֒ וַיְהִ֗י אַ֣ךְ יָצֹ֤א יָצָא֙ יַעֲקֹ֔ב מֵאֵ֥ת פְּנֵ֖י יִצְחָ֣ק אָבִ֑יו וְעֵשָׂ֣ו אָחִ֔יו בָּ֖א מִצֵּידֽוֹ׃
E aconteceu que, assim que Yitzchak terminou de abençoar Yaakov, e logo depois de Yaakov sair da presença de Yitzchak, seu pai, Esav, seu irmão, voltou de sua caçada.
Or HaChaim
כאשר דבר, as he had said. The letter כ which precedes the word אשר is a Kaf hadimyon describing a comparison, a similarity. The Torah tells us that not only did the midwives not do what the king had ordered them to do, but that they did not even do anything similar to what the king had demanded of them. The Torah could also be telling us something about the general fate of Royal decrees. Normally, when a powerful king issues a decree it is observed by his subjects due to fear. As people notice that not every violation is followed by severe penalties, more and more people begin to ignore irksome decrees. In this instance the Torah tells us that the decree was not even observed when it was still new. The midwives לא עשו, never carried out, כאשר דבר, as soon as he had said it. The word כאשר may be understood as "as soon as," just as in Genesis 27,30: "as soon as Isaac finished speaking."
Rabbeinu Bahya
According to the Midrash the reason for the word פנים is that they were one handbreadth thick, and our sages said (Sukkah 5) that the word פנים is not used for something thinner than one handbreadth. We refer to Leviticus 16,2 אל פני הכפורת, “facing the kapporet,” and we had explained in connection with the Ark that the thickness of the kapporet was 1 handbreadth. We have another verse in Genesis 27,30 מאת פני יצחק אביו, “from the face of his father Yitzchak.” The face of a human being is never thinner than a handbreadth.