The Lord was born in her womb: 'devakyam... jatah' (SB 1.1.12).
Devaki
देवकी
Devaki is a central maternal figure of the Krishna story: daughter of Devaka of Mathura's royal line, wife of Vasudeva and mother of Krishna; tradition regards her as a portion of Aditi. In the processed verses the Lord Himself took birth in her womb by His own will: 'devakyam vasudevasya jato yasya cikirshayaya' (SB 1.1.12).
Śrīmad Bhāgavata Mahāpurāṇa 1.1.12 — Sanskrit Wikisource (pinned oldid=110172)
Devaki was imprisoned by Kamsa: 'khalena devaki kamsena ruddhaticiram shucarpita' (SB 1.8.23). Direction: prisoner -> captor; 'kamsena' is instrumental, marking the agent. Evidence: EXPLICIT.