Please let me know the source of shloka
राघवो विजयं दद्यात् मम सीतापतिः प्रभुः ।
राघवस्य यथत्द्वन्द्वं दद्यात् वैभवम् ॥
raaghavo vijayam dadyAt mama sItApatiH prabhuH|
raaghavasya yathatdvandvam dadyAt amita vaibhavam||
May Raaghavan, the Lord of SeethA PirAtti grant me victory in my kaimkaryams! May His sacred pair of feet bless me with limitless glory of Kaimkaryam to Him !
I want to know from where this mantra has been picked