Vasudeva Pleads Kamsa

Srimad Bhagavatam - Vasudeva Pleads Kamsa and Makes Toughest Promise

Kamsa, the cousin of newly wedded Devaki, was curious to get rid of her as the ethereal voice indicated that her eighth child would kill him. He thought if the source is destroyed, future risk can be avoided.

Vasudeva said,” You are born in glorious Bhojas lineage. How can you slay your own cousin, a woman, who is just married?

Aren't you aware death is destined for those who are born. It is inevitable whether it comes this day or at the end of a hundred years. 

When the body is about to expire, the soul following the course of its destiny quits the former body on mentally obtaining another corporeal form.

Just as Caterpillar leaves a blade of grass only when it has caught hold of another, so does the embodied soul following the course of its destiny leave the former body when it has caught hold of another.

Why, then, should the soul burden itself with wrong doings. Your cousin is a helpless girl and is like a daughter to you. You ought not kill this girl who has just gone through the auspicious nuptial rites. 

To save his newly wedded wife, Vasudeva made the toughest promise of handing over his and Devaki sons to Kamsa. 

Kamsa, who knew the integrity of Vasudeva, agreed to his proposal and allowed them to reach their home. 

Source: Bhagavatha Mahapurana