CC Madhya-lila 06.225 - Padma Purana
Sri Caitanya-caritamrta
CC Madhya-lila
CC Madhya 6.225, Translation:
The Bhaṭṭācārya said, “‘One should eat the mahā-prasādam of the Lord immediately upon receiving it, even though it is dried up, stale or brought from a distant country. One should consider neither time nor place.
CC Madhya 6.226, Translation and Purport:
""The prasādam of Lord Kṛṣṇa is to be eaten by gentlemen as soon as it is received; there should be no hesitation. There are no regulative principles concerning time and place. This is the order of the Supreme Personality of Godhead.""
These verses are quoted from the Padma Purāṇa.