Shloka 42
Gokula’s Wonder, Kṛṣṇa’s Bhakta-vaśyatā, the Move to Vṛndāvana, and the Slaying of Vatsāsura and Bakāsura
तं वत्सरूपिणं वीक्ष्य वत्सयूथगतं हरि: । दर्शयन् बलदेवाय शनैर्मुग्ध इवासदत् ॥ ४२ ॥
taṁ vatsa-rūpiṇaṁ vīkṣya vatsa-yūtha-gataṁ hariḥ darśayan baladevāya śanair mugdha ivāsadat
至上主哈利见那魔罗化作小牛，混入牛犊群中，便指给巴拉德瓦说：“这也是一名魔。”随后他仿佛不知其意，装作天真，缓缓走近。
The import of the words mugdha iva is that although Kṛṣṇa knows everything, here He pretended that He did not understand why the demon had entered among the calves, and He informed Baladeva by a sign.
FAQs
It describes Vatsāsura entering the calf-herd in disguise, and Kṛṣṇa immediately recognizing him and moving in to deal with him while alerting Balarāma.
To inform Balarāma of the disguised danger within the herd, showing their coordinated protection of Vraja even while Kṛṣṇa outwardly acted like an innocent child.
Be alert to hidden threats, but respond calmly and thoughtfully—protecting others without panic, pride, or unnecessary display.