A saintly mendicant should not even collect foodstuffs to eat later in the same day or the next day. If he disregards this injunction and like the honeybee collects more and more delicious foodstuffs, that which he has collected will indeed ruin him.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
सायन्तनं श्वस्तनं वा न सङ्गृह्णीत भिक्षुकः । मक्षिका इव सङ्गृह्णन् सह तेन विनश्यति
sāyantanaṃ śvastanaṃ vā na saṅgṛhṇīta bhikṣukaḥ | makṣikā iva saṅgṛhṇan saha tena vinaśyati
SB 11.8.12