Shiva Purana

siva.sh/siva-purana/saturda-samhita/15/35

जन्मतो द्वादशे वर्षे तद्वचो नारदेरितम् ।। सत्यं करिष्यन्निव तमभ्यगात्कुलिशायुधः ।। ३५ ।।

sanskrit

In the twelfth year of his life, the thunderbolt, armed Indra approached him as if fulfilling the utterance of Nārada.

english translation

janmato dvAdaze varSe tadvaco nAraderitam || satyaM kariSyanniva tamabhyagAtkulizAyudhaH || 35 ||

hk transliteration by Sanscript