Who could say anything better than one who summons to Allah, and acts rightly, and says, "I am of those who submit themselves to Allah"? (Surah Fussilat, 33)
Truly man is in loss-except for those who believe and do right actions, and urge each other to the truth and to steadfastness. (Qur'an, 103: 2-3)
Then to be one of those who believe and urge each other to patience and urge each other to mercifulness. (Qur'an, 90:17)