Caitanya-caritāmṛta 4.13
ataeva viṣṇu takhana kṛṣṇera śarīre viṣṇu-dvāre kare kṛṣṇa asura-saṁhāre
[ataeva vishnu takhana krishnera shareere vishnu-dvaare kare krishna asura-samhaare]
Blended reading (Sanskrit + English inline)
ataeva viṣṇu takhana kṛṣṇera śarīre viṣṇu-dvāre kare kṛṣṇa asura-saṁhāre
At that time, therefore, Lord Viṣṇu is present in the body of Lord Kṛṣṇa, and Lord Kṛṣṇa kills the demons through Him.
My note
Source: vedabase.io