Thereafter, Aṁśumān, the grandson of Mahārāja Sagara, was ordered by the King to search for the horse. Following the same path traversed by his uncles, Aṁśumān gradually reached the stack of ashes and found the horse nearby.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
अयोध्यावासिनः सर्वे बालकान् पुनरागतान् । दृष्ट्वा विसिस्मिरे राजन् राजा चाप्यन्वतप्यत
ayodhyāvāsinaḥ sarve bālakān punarāgatān | dṛṣṭvā visismire rājan rājā cāpyanvatapyata
SB 9.8.19