CC Madhya 16.56
śrīvāsa prabhure tabe kaila nimantraṇa
All these episodes have been elaborately described by Śrīla Vṛndāvana dāsa Ṭhākura. Then one day Śrīvāsa Ṭhākura extended an invitation to the Lord.
The Caitanya-bhāgavata (Antya-khaṇḍa, chapter nine) gives the following description. One day Śrīla Advaita Ācārya, having extended an invitation to Caitanya Mahāprabhu, thought that if the Lord came alone He would feed Him to His great satisfaction. It then so happened that when the other sannyāsīs were going to Advaita Ācārya’s to take lunch, there was a big rainstorm, and they could not reach His house. Thus, according to Advaita Ācārya’s desires, Śrī Caitanya Mahāprabhu came alone and accepted the prasādam.