Shiva Purana
इंद्र लोकप्रदं विद्यादयुतं ब्रह्मलोकदम् । यां देवतां पुरस्कृत्य दानमाचरते नरः ६१ ।
It yields Indraloka to him. If he maintains ten thousand families he attains Brahmaloka. According to scholars in the Vedas, a man attains the region of that deity in meditation of whom he makes charitable gifts.
english translation
iMdra lokapradaM vidyAdayutaM brahmalokadam । yAM devatAM puraskRtya dAnamAcarate naraH 61 ।
hk transliteration by Sanscript