'Abdullah ibn 'Amr ibn al-'As reported that the Prophet, may Allahbless him and grant him peace, said, "The souls of two believers shouldmeet in the course of a day even if they do not actually see each other." (RU)
English reference (RU): Book 14, Hadith 261 (RU)
Arabic reference (RU): Book 1, Hadith 261 (RU)