Valmiki Ramayana Bala Kanda Sarga 18 Shloka 15
Original Shlokaराज्ञ: पुत्रा महात्मानश्चत्वारो जज्ञिरे पृथक्।।1.18.15।। गुणवन्तोऽनुरूपाश्च रुच्या प्रोष्ठपदोपमा:।
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गुणवन्त: endowed with every good quality, अनुरूपा: worthy, रुच्या in brightness, प्रोष्ठपदोपमा: resembling Purva Bhaadra, Uttara Bhaadra stars, महात्मान: highly noble, राज्ञ: King's, चत्वार: four, पुत्रा: sons, पृथक् successively, जज्ञिरे were born In this manner.
Four worthy sons were successively born to the noble king (Dasaratha), endowed with all virtuous, resembling purvabhadra and uttarabhadra stars in brightness.