From some Bengali Gaudiya vaishnavas i heard popular saying "sunle Mayavad Hobe sorbonash"
Is this mentioned in any authentic text of gaudiya school or books like Caitanya charitamrita?
Yes, Mahaprabhu has preached so.
"The Buddhists do not recognize the authority of the Vedas; therefore they are considered agnostics. However, those who have taken shelter of the Vedic scriptures yet preach agnosticism in accordance with the Māyāvāda philosophy are certainly more dangerous than the Buddhists."
The Māyāvādīs' conception of spiritual existence is almost identical to the negation of material existence. The Māyāvādīs believe that there is nothing positive in spiritual life. As a result, they cannot understand devotional service or the worship of the Supreme Person, sac-cid-ānanda-vigraha (Bs. 5.1). The Māyāvādī philosophers consider Deity worship in devotional service to be pratibimba-vāda, or the worship of a form that is the reflection of a false material form. Thus the Lord's transcendental form, which is eternally blissful and full of knowledge, is unknown to Māyāvādī philosophers. Although the term "Bhagavān" is explicitly described in Śrīmad-Bhāgavatam, they cannot understand it. Brahmeti paramātmeti bhagavān iti śabdyate: "The Absolute Truth is called Brahman, Paramātmā and Bhagavān." (SB 1.2.11) The Māyāvādīs try to understand Brahman only, or, at the most, Paramātmā. However, they are unable to understand Bhagavān. Therefore the Supreme Personality of Godhead, Kṛṣṇa, says, māyayāpahṛta-jñānāḥ (BG 7.15). Because of the temperament of the Māyāvādī philosophers, real knowledge is taken from them. Because they cannot receive the mercy of the Lord, they will always be bewildered by His transcendental form. Impersonal philosophy destroys the three phases of knowledge—jñāna, jñeya and jñātā. As soon as one speaks of knowledge, there must be a person who is the knower, the knowledge itself and the object of knowledge. Māyāvāda philosophy combines these three categories; therefore the Māyāvādīs cannot understand how the spiritual potencies of the Supreme Personality of Godhead act. Because of their poor fund of knowledge, they cannot understand the distinction in the spiritual world between knowledge, the knower and the object of knowledge. Because of this, Śrī Caitanya Mahāprabhu considers the Māyāvādī philosophers more dangerous than the Buddhists.
In the next verse, Mahaprabhu directly declares that anyone will be ruined if he or she listens to the Mayavadi Bhasya of the scriptures.
But we must remember that such yugavataras preach some particular doctrine for particular Adhikaaries and so they make such comments. They do not have an iota of hatred against any saint or doctrine. Mahaprabhu took sannyasa from Sri Keashava Bharati and followed the rules of Dasanami sannyasa. He sacrificed sikha-sutra as mentioned in Sri Chaitanya Charitamrita.But modern Gaudiya Vaishnavas represent him with sikha and kanthimala!
Sri Chaitanya ordered His devotees: "Anya deva, Anya sastra ninda naa koribe" "jibe samman dibe jaani Krishna-adhisthan". (Do not criticise any deity or scripture,.Respect everybody asnKrishna resides in all.
( Ref: Sri Chaitanyadev, Swami Saradeshananda, Udbodhan). The translations of Bhaktivedanta Swami has been used.
Yes, it was said by Chaitanya Mahaprabhu to Sarvabhouma Bhattacharya, in Chaitanya Charitamrita, Madhya Lila, Chapter 6, Verse 169:
jīvera nistāra lāgi’ sūtra kaila vyāsa māyāvādi-bhāṣya śunile haya sarva-nāśa
“Śrīla Vyāsadeva presented the Vedānta philosophy for the deliverance of conditioned souls, but if one hears the Mayavadi commentary, everything is spoiled.