Shiva Purana
कौमारे कर्णपीडायां मातापित्रोश्च साधनः ॥ अक्षराध्ययनाद्यैश्च नानादुःखं प्रवर्तते ॥ ५०॥
It is a means of helping parents in childhood when they have ear pain By studying the letters and so on, various sufferings are inflicted.
english translation
kaumAre karNapIDAyAM mAtApitrozca sAdhanaH ॥ akSarAdhyayanAdyaizca nAnAduHkhaM pravartate ॥ 50॥
hk transliteration by Sanscript