Amr bin al-Aswad (may Allah have mercy on him) narrates from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Indeed, among the most hated of creation to Allah, the Mighty and Majestic, is the one who believed and then disbelieved."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17362