पूर्णे वर्षसहस्रे तु काष्ठभूतं महामुनिम् । विघ्नैर्बहुभिराधूतं क्रोधो नांतरमाविशत् ॥

— श्रीमद्वाल्मीकिरामायणे बालकाण्डे पञ्चषष्टितमस्सर्गः (३) After becoming a maharshi, Vishwaamitra, as per the directions of Lord Brahma, continued his efforts for becoming जितेन्द्रिय  (winning over his Indryas). He performed a severe tapas for 1000 years. In order to test Vishwaamitra, Gods sent Rambha, the most beautiful apsara in heavens. Sage Vishwaamitra did not even slightly move…