Ramayana
मया चैतद्व्रतं चीर्णं त्वया चैव धनाधिप । तृतीयः पुरुषो नास्ति यश्चरेव्रतमीदृशम् ॥ 7-13-28 ॥
"This vow has been carried out by me and by you as well, O Lord of Wealth; there is no third person who has performed an observance such as this."
english translation