Vasudeva was very much disturbed by fear of becoming a liar by breaking his promise. Thus with great pain he delivered his first-born son, named Kīrtimān, into the hands of Kaṁsa.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कीर्तिमन्तं प्रथमजं कंसायानकदुन्दुभिः । अर्पयामास कृच्छ्रेण सोऽनृतादतिविह्वलः
kīrtimantaṃ prathamajaṃ kaṃsāyānakadundubhiḥ | arpayāmāsa kṛcchreṇa so'nṛtādativihvalaḥ
SB 10.1.57