O purest of the brāhmaṇas, please also explain the cause of the different durations of time, both short and long, as well as the beginning of time, following the course of action.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कालस्यानुगतिर्या तु लक्ष्यतेऽण्वी बृहत्यपि । यावत्यः कर्मगतयो यादृशीर्द्विजसत्तम
kālasyānugatiryā tu lakṣyate'ṇvī bṛhatyapi | yāvatyaḥ karmagatayo yādṛśīrdvijasattama
SB 2.8.13