Valmiki Ramayana Bala Kanda Sarga 34 Shloka 20
Original Shlokaकुशिकानामयं वंशो महान् धर्मपरस्सदा। ब्रह्मोपमा महात्मान: कुशवंश्या नरोत्तमा:।।1.34.20।।
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कुशिकानाम् of those belonging to the family of Kusa, अयम् वंश: this is the dynasty, महान् venerable, सदा always, धर्मपर: devoted to virtue, कुशवंश्या: belonging to Kusa dynasty, नरोत्तमा: foremost of men, महात्मान: highly revered, ब्रह्मोपमा: similar to god Brahma.
This is the family of the Kusas, venerable always devoted to dharma, foremost of men, great like Lord Brahma.