He (the muslim tailor) became one of the foremost Vaisnava adherents of Sri Caitanya Mahaprabhu

Expressions researched:
"he became one of the foremost Vaiṣṇava adherents of Śrī Caitanya Mahāprabhu"

Sri Caitanya-caritamrta

CC Adi-lila

There was a Muslim tailor near the house of Śrīvāsa Ṭhākura who used to sew the garments of the family. One day he was very pleased with the dancing of Śrī Caitanya Mahāprabhu; indeed, he was enchanted. The Lord, understanding his attitude, showed him His original form as Kṛṣṇa. The tailor then began to dance, saying, “I have seen! I have seen!” He became absorbed in ecstatic love and began to dance with Lord Caitanya. Thus he became one of the foremost Vaiṣṇava adherents of Śrī Caitanya Mahāprabhu.

CC Adi 17.232, Translation and Purport

Saying “I have seen! I have seen!” and dancing in ecstatic love as though mad, he became a first-class Vaiṣṇava.

There was a Muslim tailor near the house of Śrīvāsa Ṭhākura who used to sew the garments of the family. One day he was very pleased with the dancing of Śrī Caitanya Mahāprabhu; indeed, he was enchanted. The Lord, understanding his attitude, showed him His original form as Kṛṣṇa. The tailor then began to dance, saying, “I have seen! I have seen!” He became absorbed in ecstatic love and began to dance with Lord Caitanya. Thus he became one of the foremost Vaiṣṇava adherents of Śrī Caitanya Mahāprabhu.