Most of religious laws are VERy specific.
yes most, not all
when marriage is described in the bible do the verses ever talk about same sex couples in an accepting way? Because it often says wives, wife, man all describing heterosexual marriage. Do you know of any verses where it's ambiguous or open to interpretation with regards to gay marriage being acceptable?
since there are specifics about heterosexual marriage, duties, responsibilities it is of importance, but I am unaware of any such instructions towards homosexual marriage, are there any?
I will assume there isn't but open to change my mind, but if there aren't any we'd have to ask why, couple of reasons I can think of, they simply forgot? not very likely, it just wasn't a thing back then and or it couldn't be a thing back then, it was not accepted, acceptable.
the bible acknowledges man and woman unions,marriages whatever in an acceptable way, but not homosexual ones that I'm aware of.