Skandapurana 16.19.57

16.19.57

aṃguṣṭhāddakṣiṇāddakṣo bhaviṣyatyadhunā priye ..
yugeyuge bhavantyete sarve dakṣādayo dvijāḥ .. 57 ..

Now, my dear, Dakṣa will be born from the right thumb. / In every yuga, all these twice-born ones such as Dakṣa come into being,