Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 57
Sanskrit:
तं दृष्ट्वा देवकी देवी मृतागमननिर्गमम् ।मेने सुविस्मिता मायां कृष्णस्य रचितां नृप ॥ ५७ ॥
ITRANS:
taṁ dṛṣṭvā devakī devīmṛtāgamana-nirgamammene su-vismitā māyāṁkṛṣṇasya racitāṁ nṛpa
Translation:
Seeing her sons return from death and then depart again, saintly Devakī was struck with wonder, O King. She concluded that this was all simply an illusion created by Kṛṣṇa.