When the doorman asked, 'Which Brahma? Lord Brahma was surprised. He told the doorman, Please go inform Lord Krsna that I am the four-headed Brahma who is the father of the four Kumaras

Expressions researched:
"When the doorman asked, ‘Which Brahmā?’ Lord Brahmā was surprised. He told the doorman, ‘Please go inform Lord Kṛṣṇa that I am the four-headed Brahmā who is the father of the four Kumāras"

Sri Caitanya-caritamrta

CC Madhya-lila

When the doorman asked, ‘Which Brahmā?’ Lord Brahmā was surprised. He told the doorman, ‘Please go inform Lord Kṛṣṇa that I am the four-headed Brahmā who is the father of the four Kumāras.

CC Madhya 21.61, Translation

When the doorman asked, ‘Which Brahmā?’ Lord Brahmā was surprised. He told the doorman, ‘Please go inform Lord Kṛṣṇa that I am the four-headed Brahmā who is the father of the four Kumāras.