It is narrated from Sayyiduna Zayd bin Thabit (may Allah be pleased with him) that when he lay down he used to make this supplication: "O Allah, I ask You for prosperity for my family and my dependants, and I seek refuge in You from a tie of kinship that I have severed invoking evil against me."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 4830