CC Madhya 24.343

sarvatra pramāṇa dibe purāṇa-vacana
śrī-mūrti-viṣṇu-mandira-karaṇa-lakṣaṇa
Word for word: 
sarvatra — everywhere; pramāṇa — evidence; dibe — you should give; purāṇa-vacana — quoting from the Purāṇas; śrī-mūrti — the Deity; viṣṇu-mandira — of the Viṣṇu temple; karaṇa-lakṣaṇa — the characteristics of constructing.
Translation: 
“Whatever you say about Vaiṣṇava behavior, the establishment of Vaiṣṇava temples and Deities, and everything else should be supported by evidence from the Purāṇas.