Ramayana
ततो ददुर्लोकपालाः सर्वे भागान्स्वतेजसः । अक्षुपच्च ततो ब्रह्मा यतो जातः क्षुपो नृपः ॥ 7-76-42 ॥
Thereupon all the guardians of the worlds gave portions of their own energy, and Brahma too gave a portion to Kshupa; from which the king Kshupa was born.
english translation