Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 48
Sanskrit:
व्यूढायाश्चापि पुंश्चल्या मनोऽभ्येति नवं नवम् ।बुधोऽसतीं न बिभृयात् तां बिभ्रदुभयच्युत: ॥ ४८ ॥
ITRANS:
vyūḍhāyāś cāpi puṁścalyāmano ’bhyeti navaṁ navambudho ’satīṁ na bibhṛyāttāṁ bibhrad ubhaya-cyutaḥ
Translation:
The mind of a promiscuous woman always hankers for new lovers, even if she is married. An intelligent man should not keep such an unchaste wife, for if he does he will lose his good fortune both in this life and the next.