Ramayana
महता तपसा लब्धो विविधैश्च परिश्रमैः । एको दशरथस्यैष पुत्रः सदृशलक्षणः ॥ २-८६-१२
Rama is the only one among the sons who resembles his father in various virtues. Dasaratha obtained him after a great deal of austerities and efforts as well. ॥ 2-86-12॥
english translation
mahatA tapasA labdho vividhaizca parizramaiH । eko dazarathasyaiSa putraH sadRzalakSaNaH ॥ 2-86-12
hk transliteration by Sanscript