and it is lost. The Prophet ﷺ even swore to this when he said—in the hadith of Abu Musa al-Ashʿari (may Allah be pleased with him): “Commit yourselves to the Quran, for by the One in whose hand my soul rests, it slips away faster than a camel released from its hobble.”
Therefore you ought to assign yourself a fixed ḥizb (set portion) that you review every day. You might decide, for example, to recite one juzʾ daily and thus complete the Quran in 30 days; or two juzʾs a day and finish in 15 days; or three, completing it in 10 days, or nine, or even three. Whichever schedule you choose, keep at it so that you do not forget.
Several hadiths warn against forgetting the Quran through negligence. Involuntary, natural forgetfulness is not blameworthy; what is feared is the punishment that may befall the one who—after Allah has favored him with memorization—then abandons and ignores it.
My brother, if Allah has blessed you with the Quran, preserve it by reading, reciting, and repeatedly rehearsing it—and by acting upon it. Practice anchors knowledge and keeps it alive. For this reason some scholars have said, “Bind knowledge with practice,” because acting on what you know keeps it ever present in your heart and on your limbs; in that state it endures and is not forgotten. But if it is neglected, it disappears.
Whoever recites the Quran should do so with reflection and deliberation. It is impermissible to rush to the point that some letters are dropped, for omitting letters alters Allah’s words, changing them from their proper places. As for a level of speed that does not cause any letters to be lost, there is no harm in it. Allah is the giver of success.