O mother Devaki, 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 - SB 10.2.41

Expressions researched:
"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"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

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.

SB 10.2.41, Translation and Purport

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.

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 (SB 1.3.28)). 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."