On reaching Pushkara, while Ambareesha is taking rest, Shunahshepa approaches Vishvamitra, who was practising austerities there, and inquires of him a means of escaping death without meeting with the kings's opposition, whereupon Vishvamitra teaches him a prayer each for propitiating Indra and Lord Vishnu respectively, by reciting which the boy secures release from Ambareesh's bondage and the latter gets the reward of the sacrifice without sacrificing him.
Recitation: 
Translation: 

Balakanda Sarga 63, "Vishvamitra Tapobhangaha" (Book 1 Canto 63)

This podcast includes an authentic Sanskrit recitation and the reading of a genuine translation in English by Gita Press, Gorakhpur, India. This is not a western translation of the Valmiki Ramayana, nor a re-telling in any form. It is translated by Hindus from within the tradition, and it is thereby recommended as the most authentic recitation and English reading available.

The Ramayana recitation by Sriram-ghanapaathi HariSitaramamurti-ghanapathi is taken from archive.org. The reading is from the English version of Srimad Valmiki Ramayan translation by Gita Press, Gorakhpur, India.