Oecumenius

And now, little children, abide in Him, so that when He appears we may have confidence and not be ashamed before Him at His coming. If you know that He is righteous, you know that everyone who practices righteousness is born of Him.

Commentary on 1 John ↗

Augustine of Hippo

"Even as it hath taught you, abide ye in the same. And now, little children, abide ye in Him, that when He shall be manifested, we may have boldness in His sight, that we be not put to shame by Him at His coming." Ye see, brethren: we believe on Jesus whom we have not seen: they announced Him, that saw, that handled, that heard the word out of His own mouth; and that they might persuade all mankind of the truth thereof, they were sent by Him, not dared to go of themselves. And whither were they sent? …

Ten Homilies on 1 John 4 ↗

Bede

And now, little children, abide in him, so that when he appears, etc. Whoever remains in the Lord amidst the persecutions of the unbelievers, amidst the mockeries of carnal neighbors, has confidence in his coming, knowing that the patience of the poor will not perish at the end. …

Commentary on the Catholic Epistles ↗