Please explain all the different ages in the duration of the creation, and also the duration of such ages. Also tell me about the different activities of the different incarnations of the Lord in different ages.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
युगानि युगमानं च धर्मो यश्च युगे युगे । अवतारानुचरितं यदाश्चर्यतमं हरेः
yugāni yugamānaṃ ca dharmo yaśca yuge yuge | avatārānucaritaṃ yadāścaryatamaṃ hareḥ
SB 2.8.17