“Monks, these two are fools. Which two? The one who takes up a burden that hasn’t fallen to him, and the one who doesn’t take up a burden that has. These two are fools.”
AN2.99: Bāla Sutta
Bāla Sutta: Fools - translated by Thanissaro Bhikkhu
Translated by Thanissaro Bhikkhu. Source text via dhammatalks.org.