Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 31
Sanskrit:
ऋषयोऽपि तयोर्वीक्ष्य प्रसङ्गं रममाणयो: ।निवृत्ता: प्रययुस्तस्मान्नरनारायणाश्रमम् ॥ ३१ ॥
ITRANS:
ṛṣayo ’pi tayor vīkṣyaprasaṅgaṁ ramamāṇayoḥnivṛttāḥ prayayus tasmānnara-nārāyaṇāśramam
Translation:
Seeing Lord Śiva and Pārvatī engaged in sexual affairs, all the great saintly persons immediately desisted from going further and departed for the āśrama of Nara-Nārāyaṇa.