Acts 21:20

And when they heard it, they glorified the Lord, and said unto him, You see, brother, how many thousands of Jews there are who believe; and they are all zealous of the law:
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George Leo Haydock

AD 1849
How many thousands. In the Greek, how many ten thousands. (Witham)

John Chrysostom

AD 407
Two reasons— the number of them, and their views. For neither had they been few, would it have been right to despise them: nor, if they were many and did not all cling to the law, would there have been need to make much account of them. Then also a third cause is given: And they all, it says, have been informed of you— they say not,have heard, but κατηχήθησαν, that is, so they have believed, and have been taught, that you teach apostasy from Moses to all the Jews which are among the Gentiles, by telling them not to circumcise their children, neither to walk after the customs.

Tertullian of Carthage

AD 220
On account of "supposititious false brethren; "and leading certain "shaven men "into the temple

Knowing this first, that no prophecy of the scripture is of any private interpretation - 2 Peter 1:20

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