Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) said: I saw the Messenger of Allah (peace and blessings be upon him) mention the womb (ties of kinship), and placing one of his fingers upon the other, he (peace and blessings be upon him) said: "Whoever joins you, I will join him, and whoever cuts you off, I will cut him off."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13712