Devibhagavatapurana 6.9.32

6.9.32

bhaviṣyāmi turāṣāḍ vai satyametadvaco mama |
nahuṣa uvāca |
avaśyameva kartavyaṃ vacanaṃ tava sundari ||

Nahusa said:-- “O Beautiful One! On all the sacrifices and gifts that I have ever made, I swear, on all my merits, that I will certainly carry out your word.”