Or HaChaim on Exodus 1:16/אור החיים על שמות א׳:ט״ז

1 ויאמר…וראיתן על האבנים, He said: "look at the birthstool, etc." Why did Pharaoh have to instruct the midwives to look at the birthstool? Was it not enough to instruct them to kill male babies? It is true that our sages in Sotah 11 say that Pharaoh gave the midwives a sign which would alert them to the approaching birth of a male baby i.e. if the head of the baby was facing downwards, whereas if the head faced upwards this was an indication that a baby girl was about to be born. I have never understood why the midwives would need to be told such a sign [After all they were supposed to be the experts, not Pharaoh. Ed.]. Another thing we have to know is why Pharaoh did not decree death on all Jewish babies. It is most unlikely that he was motivated by a desire to ensure that some Jews would survive. Why did he not command the midwives simply: "kill them," without suggesting that they do something first which would eventually result in the death of these boy babies? What is the precise meaning of "If it turns out to be a daughter, let her live?" If Pharaoh himself had only decreed death on the males, why would the midwives need to be told to let the girls live? Surely midwives would not murder voluntarily!

2We must assume that Pharaoh wanted to ensure that his plan would succeed. Which expectant mother would expose her unborn child to be killed by inviting the midwife? Pharaoh therefore told the midwives to behave in a manner which could not arouse any suspicion. By having a look at the birthstool to determine if a girl or a boy was about to be born, they would be able to kill the baby prior to its being born and tell the mother that the baby had been stillborn. The midwives would announce this before the baby had left the mother's womb. How did the midwives know all this? This is where the sign mentioned in the Talmud comes in. Pharaoh told the midwives how to make sure beforehand. When he said והמתן אותו "and you shall kill it," the extra letter ו indicates that they should only kill after first having made sure that it was a male baby. The baby was to be killed before it could be heard at the moment of birth.

3The words אם בת היא mean that Pharaoh was anxious to avoid having the mothers think that the midwives were implicated in murder; therefore as long as the mothers felt that some of their babies survived birth they would not grow suspicious of the midwives. Presumably the midwives were not even to reveal that the stillborn baby had been a boy. In this fashion suspicions could be long delayed.

4Pharaoh displayed a double portion of shrewdness since it was also his objective to prevent the Jews from emigrating. As the proportion of females would increase they would be forced to look for Egyptian husbands due to the dearth of eligible Jewish males. Once the two peoples began to merge through intermarriage there was no longer any fear that they would try to emigrate. Moreover, from a mystical point of view, intermarriage results in holy souls becoming so intertwined with souls of impure origin that any eventual separation would become well nigh impossible. After all, our sages are on record in Vayikra Rabbah 32,5 that the Jewish people could not be redeemed from Egypt until 4 conditions existed, one of which was careful abstention from all kinds of incest and sexual licentiousness. Kabbalists interpret the words גן נעול in Song of Songs 4,12 as "chaste as a garden locked," i.e. that if the Jews had intermarried in Egypt they would never have been redeemed.