Shiva Purana
वृद्धानां रुद्र बुद्ध्या हि देयं ज्ञानार्थिभिर्नरैः । बालस्त्रीभारतीबुद्ध्या बुद्धिकामैर्नरोत्तमैः ३७ ।
Those who seek knowledge must make gifts to old men considering them on a par with Rudra. Those who seek intellect must make gifts to young maidens considering them on a par with Bhāratī (Goddess of Speech).
english translation
vRddhAnAM rudra buddhyA hi deyaM jJAnArthibhirnaraiH । bAlastrIbhAratIbuddhyA buddhikAmairnarottamaiH 37 ।
hk transliteration by Sanscript