58 The substantive כֹּל (kol) followed by the article stresses the entirety—“all sons” or “all daughters”—even though the nouns are singular in Hebrew (see §127.b).
59 The form includes a pronominal suffix that reiterates the object of the verb: “every son … you will throw it.”
60 The first imperfect has the force of a definite order, but the second, concerning the girls, could also have the nuance of permission, which may fit better. Pharaoh is simply allowing the girls to live. Verse 22 forms a fitting climax to the chapter, in which the king continually seeks to destroy the Israelite strength. Finally, with this decree, he throws off any subtlety and commands the open extermination of Hebrew males. The verse forms a transition to the next chapter, in which Moses is saved by Pharaoh’s own daughter. These chapters show that the king’s efforts to destroy the strength of Israel—so clearly a work of God—met with failure again and again. And that failure involved the efforts of women, whom Pharaoh did not consider a threat.

In other versions

Then Pharaoh commanded all his people, “Every son that is born to the Hebrews you shall cast into the Nile, but you shall let every daughter live.”

Then Pharaoh gave this order to all his people: “Every Hebrew boy that is born you must throw into the Nile, but let every girl live.”

Pharaoh then commanded all his people, “You must throw every son born to the Hebrews into the Nile, but let every daughter live.”

Then Pharaoh gave this order to all his people: “Throw every newborn Hebrew boy into the Nile River. But you may let the girls live.”

And Pharaoh commanded all his people, saying, “Every son who is born you will throw into the Nile, and every daughter you will let live.”

And Pharaoh charged all his people, saying, Every son that is born ye shall cast into the river, and every daughter ye shall save alive.

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