9 Then all the men of Judah and Benjamin gathered themselves together unto Jerusalem within three days. It was the ninth month, on the twentieth day of the month; and all the people sat in the street of the house of God, trembling because of this matter, and for the great rain.
[AD 220] Tertullian on Ezra 10:9
If these things are so, it is certain that believers contracting marriages with Gentiles are guilty of fornication, and are to be excluded from all communication with the brotherhood, in accordance with the letter of the apostle, who says that “with persons of that kind there is to be no taking of food even.”  [To His Wife 2.3 ANF v.4]

[AD 420] Jerome on Ezra 10:9
I will say what the Apostle has taught me, that they are not on the side of righteousness, but of iniquity: not of light, but of darkness: that they do not belong to Christ, but to Belial: that they are not temples of the living God, but shrines and idols of the dead. And, if you wish to see more clearly how utterly unlawful it is for a Christian woman to marry a Gentile, consider what the same Apostle says, [1 Corinthians 7:39] "A wife is bound for so long time as her husband lives: but if the husband be dead, she is free to be married to whom she will; only in the Lord," that is, to a Christian. He who allows second and third marriages in the Lord, forbids first marriages with a Gentile. Whence Abraham also makes his servant swear upon his thigh, that is, on Christ, Who was to spring from his seed, that he would not bring an alien-born as a wife for his son Isaac. And Ezra checked an offense of this kind against God by making his countrymen put away their wives.

[AD 430] Augustine of Hippo on Ezra 10:9
If this is the Lord's commandment, in both the Old Testament and the New, and this is what the Lord commands, and this is what the apostle teaches, namely, that only spouses of the same religions and faith may remain joined. [De coniugiis adulterinis, PL 40.25.465]
[AD 735] Bede on Ezra 10:9
He is the new moon, on the twentieth day of the month, etc. The ninth month is the same which the Hebrews call Casleu, and the Romans call December, which comes in the middle of winter and is rainy and stormy, as anyone would know. Therefore, it should be noted more diligently that when the people gathered in mid-winter, they were reminded to tremble from sin and rains. For when they saw that rains were falling even more than usual during the season of rains, they returned to their conscience and understood this to be due to their crimes and feared the celestial wrath that would come, being warned by the disturbance in the atmosphere. Therefore, they did not presume to conduct their affairs in private houses but gathered in the square of the house of the Lord, having assumed the habit of penitence and humility. This is mentioned for those who, although the elements are disturbed, and either by the noise of the winds, the flooding of the rains, the heaps of snow, the heat of drought, or even the ruin of men or animals increasing from above, and with the same Judge by clear signs threatening the force of His wrath, do not inquire at all about the correction of morals, by which they might please the Judge and evade the impending plague, but only diligently consider by what skill they might either avoid or overcome the adversities that rage outside due to sins. But the people sat in the square of the house of God, that is, around the priest’s court, which was surrounded everywhere by the house of God itself, as we taught above; having around it on every side in a square the spacious houses of the courts, in which the people could stand when necessary due to the rains and still see what was happening at the temple gates or around the temple. For the inner walls were made with columns up to the ground, and the outer walls were solid.