New Revised Standard Version
Since we have heard that certain persons who have gone out from us, though with no instructions from us, have said things to disturb you and have unsettled your minds,

Contemporary English Version
We have heard that some people from here have terribly upset you by what they said. But we did not send them!

New American Bible
Since we have heard that some of our number [who went out] without any mandate from us have upset you with their teachings and disturbed your peace of mind,

Douay-Rheims Bible
Forasmuch as we have heard that some going out from us have troubled you with words, subverting your souls, to whom we gave no commandment:

Forasmuch as we have heard that some going out from us have troubled you with words, subverting your souls, to whom we gave no commandment:

that certain.

Jeremiah 23:16 Thus saith the Lord of hosts: Hearken not to the words of the prophets that prophesy to you, and deceive you: they speak a vision of their own heart, and not out of the mouth of the Lord.

Galatians 2:4 But because of false brethren unawares brought in, who came in privately to spy our liberty which we have in Christ Jesus, that they might bring us into servitude.

Galatians 5:4,12 You are made void of Christ, you who are justified in the law: you are fallen from grace. . . .

2 Timothy 2:14 Of these things put them in mind, charging them before the Lord. Contend not in words: for it is to no profit, but to the subverting of the hearers.

Titus 1:10,11 For there are also many disobedient, vain talkers and seducers: especially they who are of the circumcision. . . .

1 John 2:19 They went out from us but they were not of us. For if they had been of us, they would no doubt have remained with us: but that they may be manifest, that they are not all of us.

Ye must.

Acts 15:1,9,10 And some, coming down from Judea, taught the brethren: That, except you be circumcised after the manner of Moses, you cannot be saved. . . .

Galatians 2:3,4 But neither Titus, who was with me, being a Gentile, was compelled to be circumcised. . . .

Galatians 6:12,13 For as many as desire to please in the flesh, they constrain you to be circumcised, only that they may not suffer the persecution of the cross of Christ. . . .