O great souls, your children have suffered their own misfortune. Therefore, please do not lament for them. All living entities are under the control of the Supreme, and they cannot always live together.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
मा शोचतं महाभागावात्मजान् स्वकृतम्भुजः । जन्तवो न सदैकत्र दैवाधीनास्तदासते
mā śocataṃ mahābhāgāvātmajān svakṛtambhujaḥ | jantavo na sadaikatra daivādhīnāstadāsate
SB 10.4.18