Saurapurana 28.7

28.7

saṃkalpāyāstu saṃkalpo muhūrtastu muhūrtajāḥ
arundhatyāstvarundhatyāṃ marutvatyāṃ marutvataḥ

Saṃkalpa was born of Saṃkalpā; the Muhūrtas were born of Muhūrtā;
Arundhatī's offspring was from Arundhatī; the Marutvats were born of Marutvatī;