What is the ruling on WhatsApp groups reminding subscribers of adhkar (remembrances of Allah) and the application of sunan (Prophet's traditions), along with their commitment to donate an ongoing charity (sadaqah jariyah) on behalf of the deceased of those who commit to reading a juz' (part of the Qur'an) and the required adhkar, in exchange for informing the group upon completion of these?

Groups that aim to compete in good deeds may lead to pitfalls, including: showing off (riya'), seeking renown (sum'ah), and striving for status by openly performing good deeds, even though the general principle for supererogatory acts of worship is to conceal them.

Similarly, arranging rewards for good deeds contradicts the perfection of sincerity (ikhlas (definition)), for the highest degree of sincerity is that a Muslim should not hope for anything from his action except the pleasure of Allah.

Among the pitfalls as well: the organizers of these groups might innovate arrangements that could lead to falling into innovations (bid'ah), such as restricting absolute ذكر (dhikr) to specific numbers and times.

Therefore, it is advisable not to create or join these groups, and to suffice with groups that encourage good deeds desired by the Sharia (definition), while clarifying their rewards and virtues.