Ayat 71. The believers, men and women, are Rafiqs' (helpers, supporters, friends, protectors) of one another, they enjoin (on the people) Al-Maruf (i.e. Islamic Monotheism and all that Islam orders one to do), and forbid (people) from Al-Munkar (i.e. polytheism and disbelief of all kinds, and all that Islam has forbidden); they perform As-Salat (Iqamat-as-Salat) and give the Zakat, and obey Allah and His Messenger. Allah will have His Mercy on them. Surely Allah is All-Mighty, All-Wise.
Abu Hurairah (May Allah be pleased with him) reported: Messenger of Allah [SAWW](PBUH) said, "If anyone calls others to follow right guidance, his reward will be equivalent to those who follow him (in righteousness) without their reward being diminished in any respect, and if anyone invites others to follow error, the sin, will be equivalent to that of the people who follow him (in sinfulness) without their sins being diminished in any respect". [Muslim Hadith # 6470].
Lesson : as mentioned above in Surah At-Taubah Ayat 71 "they enjoin (on the people) Al-Maruf, and forbid (people) from Al-Munkar." Invitation' and `Call' stand to mean here that someone induces others to virtue or seduces to sin by means of his speech or action. We come to know from this Hadith that one who becomes a medium for either of them is given a reward or punishment respectively by Allah (SWT).