Adam Clarke on Matthew 2:13

Flee into Egypt - Many Jews had settled in Egypt; not only those who had fled thither in the time of Jeremiah, see Jeremiah 48; but many others who had settled there also, on account of the temple which Onias IV. had built at Heliopolis. Those who could speak the Greek tongue enjoyed many advantages in that country: besides, they had the Greek version of the Septuagint, which had been translated nearly 300 years before this time. Egypt was now a Roman province, and the rage of Herod could not pursue the holy family to this place. There is an apocryphal work in Arabic, called the Gospel of the infancy, which pretends to relate all the acts of Jesus and Mary while in Egypt. I have taken the pains to read this through, and have found it to be a piece of gross superstition, having nothing to entitle it to a shadow of credibility.