Stack Exchange content itself is licensed with specific attribution requirements and thus it would be discourteous (aside from any actual legal technicalities) not to attribute a biblical translation as requested. (Or at least in a visible and unambiguous fashion.)
The practice of a visible attribution that is then linked to a site like Bible Gateway as suggested by otherssuggested by others appears to be the socially accepted procedure. It also seems like a reasonable accommodation for a site where users may use any translation they choose which makes it very difficult to provide all the exact requested copyright statements for any given contribution.
In short, I have no idea whether a linked attribution as illustrated in other posts is enough to prevent a legal dispute, but it does seem like a reasonable and respectful approach from my perspective.