Jundub · Virtues of the Qur'an

Once the Prophet (ﷺ) fell ill and did not offer the night prayer (Tahajjud prayer) for a night or two. A woman (the wife of Abu Lahab) came to him and said, "O Muhammad ! I do not see but that your Satan has left you." Then Allah revealed (Surat-Ad-Duha): 'By the fore-noon, and by the night when it darkens (or is still); Your Lord has not forsaken you, nor hated you.' (93)

The Prophet (ﷺ) said, "Recite (and study) the Qur'an as long as you agree about its interpretation, but when you have any difference of opinion (as regards its interpretation and meaning) then you should stop reciting it (for the time being)'