It is narrated from Sayyiduna Samurah bin Jundub (may Allah be pleased with him); he says that the Messenger of Allah (peace and blessings be upon him) used to say to us: "Do not swear by false deities (taghut), and do not swear by your fathers. Swear by Allah, for He loves that you swear by Him, and do not swear by anything besides Him."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 7001