Galatians 2:4

And that because of false brethren unawares brought in, who came in privily to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage:

This was because of the false brothers secretly brought in, who stole in to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage;

and that because of the false brethren privily brought in, who came in privily to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage:

and `that' because of the false brethren brought in unawares, who did come in privily to spy out our liberty that we have in Christ Jesus, that us they might bring under bondage,

This issue arose because some false brothers had come in under false pretenses to spy on our freedom in Christ Jesus, in order to enslave us.