Srimad-Bhagavatam: Canto 11 - Chapter 1 - Verse 60
Sanskrit:
तासां पतत्रै: सुस्पर्शै: कूजितैर्मुग्धचेष्टितै: ।प्रत्युद्गमैरदीनानां पितरौ मुदमापतु: ॥ ६० ॥
ITRANS:
tāsāṁ patatraiḥ su-sparśaiḥkūjitair mugdha-ceṣṭitaiḥpratyudgamair adīnānāṁpitarau mudam āpatuḥ
Translation:
The parent birds became very joyful by observing the soft wings of their children, their chirping, their lovely innocent movements around the nest and their attempts to jump up and fly. Seeing their children happy, the parents were also happy.