One verse

Srimad Bhagavatam 10.2.23

10.2.23

इति घोरतमाद् भावात् सन्निवृत्त: स्वयं प्रभु: । आस्ते प्रतीक्षंस्तज्जन्म हरेर्वैरानुबन्धकृत् ॥ २३ ॥

iti ghoratamād bhāvāt sannivṛttaḥ svayaṁ prabhuḥ āste pratīkṣaṁs taj-janma harer vairānubandha-kṛt

iti
thus (thinking in the above-mentioned way)
ghora-tamāt bhāvāt
from the most ghastly contemplation of how to kill his sister
sannivṛttaḥ
refrained
svayam
personally deliberating
prabhuḥ
one who was in full knowledge (Kaṁsa)
āste
remained
pratīkṣan
awaiting the moment
tat-janma
until the birth of Him
hareḥ
of the Supreme Personality of Godhead, Hari
vaira-anubandha-kṛt
determined to continue such enmity

Śukadeva Gosvāmī said: Deliberating in this way, Kaṁsa, although determined to continue in enmity toward the Supreme Personality of Godhead, refrained from the vicious killing of his sister. He decided to wait until the Lord was born and then do what was needed.