There are several ways that can be done to prevent the memorization of the Koran from being easily lost. First, you need to get used to reading and practicing memorizing the Koran regularly. This will help you get used to the verses that you have memorized, so that your memorization of the Koran will be stronger and not easily lost. https://penerbitjabal.com/penyebab-hilangnya-hafalan-al-quran/