It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Love the Arabs for three reasons: because I am an Arab, the Qur'an is Arabic, and the speech of the people of Paradise is Arabic."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11393