Sorry, but "forced to voluntarily commit himself"? Doesn't sound like a voluntary hold to me. You don't bother to say where you are, so you can't expect folks to provide meaningful feedback even if they happen to know what the laws are in your state.
If it's a 72-hour hold, the hospital would presumably need to have a court order to hold him involuntarily beyond that. Your husband should let the hospital know that he is leaving, if they want him to sign any paperwork. If they refuse to let him leave and they don't have a court order of commitment, presumably you-he should call the cops.
