The prophet (saw) said "If Allah loves someone He calls (angel) Jibreel and says: I love so-and-so, so you love him. Jibreel loves him, and calls the other angels in Heaven to love that person. They love him, then his love will be made upon earth, and he becomes loved. And if Allah hates someone He calls Gabriel and says: I hate so-and-so and you hate him. Jibreel hates him and calls the angels in Heaven and says: Allah hates so-and-so, so you all hate him. They all hate him, and his hatred is made upon earth and he becomes hated." (Muslim)