Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 41
Sanskrit:
दिष्टयाम्ब ते कुक्षिगत: पर: पुमा-नंशेन साक्षाद् भगवान् भवाय न: ।माभूद् भयं भोजपतेर्मुमूर्षो-र्गोप्ता यदूनां भविता तवात्मज: ॥ ४१ ॥
ITRANS:
diṣṭyāmba te kukṣi-gataḥ paraḥ pumānaṁśena sākṣād bhagavān bhavāya naḥmābhūd bhayaṁ bhoja-pater mumūrṣorgoptā yadūnāṁ bhavitā tavātmajaḥ
Translation:
O mother Devakī, by your good fortune and ours, the Supreme Personality of Godhead Himself, with all His plenary portions, such as Baladeva, is now within your womb. Therefore you need not fear Kaṁsa, who has decided to be killed by the Lord. Your eternal son, Kṛṣṇa, will be the protector of the entire Yadu dynasty.
Purport:
The words paraḥ pumān aṁśena signify that Kṛṣṇa is the original Supreme Personality of Godhead. This is the verdict of the śāstra (kṛṣṇas tu bhagavān svayam). Thus the demigods assured Devakī, “Your son is the Supreme Personality of Godhead, and He is appearing with Baladeva, His plenary portion. He will give you all protection and kill Kaṁsa, who has decided to continue his enmity toward the Lord and thus be killed by Him.”