“Recite the Qur’ān as long as your hearts are united, but when you begin to differ, then leave off its recitation.”

Narrated by al-Bukhārī (no. 5060) — this is his wording — and Muslim (no. 2667), from the narration of Jundub (may Allah be pleased with him).

Brief Explanation of the Hadith

The Noble Qur’ān is a guide to that which is most upright, and the Muslim is in dire need of its guidance — more so than his need for food and drink. Among the greatest means to perceiving and internalizing the Qur’ān’s guidance is to recite it with reflection (tadabbur) and a present, attentive heart — whether individually or in the company of fellow Muslims, reading and studying it together with mutual affection and harmony.
They should persist in its recitation as long as their hearts remain united, in agreement, and inclined toward it, for this is more conducive to developing a close bond with the Qur’ān, encouraging presence of heart, active contemplation, and fulfilling the rights due to its recitation.
However, if they begin to differ in understanding its meanings, and doubts arise that lead to contention, division, and dispute — giving rise to tribulation, argumentation, and discord — then at that point, they must disengage from the gathering and part ways, lest the disagreement lead to a greater harm.
Rather, it becomes incumbent upon them to abandon the speculative matters that cause division, and instead adhere to the clear, definitive teachings (muḥkamāt) that cultivate unity and mutual affection. Thus, in this hadīth, the Prophet (may Allah’s peace and blessings be upon him) guides (the ummah) toward that which safeguards their unity and sustains their brotherhood, while issuing a stern warning against dispute and division in matters of religion.
The ḥadīth encourages unity and warns against division in matters of religion, and it urges the abandonment of disputation over the Qur’an without just cause.