Garudapurana 3.28.83

3.28.83

bhāryādvayaṃ hyaviditvā svarūpaṃ svīkṛtya caikāṃ pravihāyaiva caikām /
snānādikaṃ kurute mūḍhabūddhiḥ vyarthaṃ cāhurmokṣabhogau ca naiva /
etatsarvaṃ yadi mithyā bhavettu tadā tvasau māṃ daśatu hyahīndraḥ //

Not knowing the nature of the two wives, having accepted one and abandoned the other, / a foolish-minded person performs bathing and other rites; they declare it in vain, and he attains neither liberation nor enjoyment. / If all this should be false, then let this king of serpents bite me!