Shiva Purana
तदैव मुनिना तेन सौमित्रिः प्रेषितो हठात् ॥ तन्तत्याज द्रुतं रामो बन्धुं पणवशान्मुने ॥ ५३ ॥
At the very same time Lakṣmaṇa was obstinately sent in by Durvāsas. O sage, Rāma immediately forsook his brother in accordance with the earlier agreement.
english translation
tadaiva muninA tena saumitriH preSito haThAt ॥ tantatyAja drutaM rAmo bandhuM paNavazAnmune ॥ 53 ॥
hk transliteration by Sanscript