आत्मवान् assumed original form, सः that, शैलसङ्काशः appearing like a mountain, भूत्वा becoming, क्षणेन in a moment, ह्रस्वताम् very small, प्राप्तः became, बन्धनानि all bondage, अवशातयत् casting off.

From his mountainlike form he assumed his original small figure within a moment casting off the bonds.