SB 10.2.23
iti ghoratamad bhavat
sannivrttah svayam prabhuh
aste pratiksams taj-janma
harer vairanubandha-krt
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Sukadeva Gosvami said: Deliberating in this way, Kamsa, 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.