Islam
Kinship Is a Covenant, Not a Contract
Silat al-rahim — maintaining the ties of the womb — is not a handshake agreement that the other party can nullify by going cold on the drive home. Islamic jurisprudence is precise on this point: the obligation runs not between you and your brother but between you and Allah, which means your brother's failure to reciprocate does not release you from the bond. The Prophet Muhammad said the true maintainer of kinship is not the one who is shown warmth and returns it — any merchant can do that — but the one who persists when it is not returned. The asymmetry is not an accident of the teaching; it is the entire weight of it. The lamp does not require the room to deserve light before it burns.
“The one who maintains kinship is not the one who reciprocates, but the one who keeps ties with those who sever them.”
— Sahih al-Bukhari 5645