Skandapurana 5.159.5

5.159.5

yadyahaṃ tava vārtāṃ ca sarvāṃ kapaṭasaṃbhavām ..
kathayāmi dvitīyasya tatte pādau spṛśāmyaham .. 5 ..

If I tell your entire tale born of deceit / to another person, then I touch your feet [in false oath]!”