Saurapurana 28.6

28.6

dharmasya patnayastvetāstāsāṃ saṃtatirucyate
sādhyā babhūvuḥ sādhyāyāṃ viśvāyāṃ viśvadevatāḥ

These were the wives of Dharma; their lineage is told:
The Sādhyas were born of Sādhyā; the Viśvedevas were born of Viśvā;