How to make up the witr prayer for one who slept through it or forgot it

Question:
If I do not remember the witr until two or three days later, what should I do?

Answer:
If one sleeps through the witr or forgets it, it is prescribed for him to pray whatever is easy for him during the duha time. Once the duha time passes, the recommended practice is gone, and nothing remains obligatory upon him. However, it is prescribed for him to compensate for it with the duha prayer if he forgot it at night; he prays rak'ahs of duha; this is the recommended practice.
If the witr is missed, it is recommended for him to pray during the duha time an amount corresponding to that, but he should make his prayer even-numbered and not perform witr. Aisha (may Allah be pleased with her) said: And his witr was usually eleven rak'ahs (peace and blessings be upon him). So if he slept through it, or illness prevented him from it, he would pray twelve rak'ahs during the day, meaning six taslims. This is the best.
If you used to pray five rak'ahs at night, and you missed the witr due to sleep or illness, you pray six rak'ahs during the day; one added, three taslims. And if your habit was seven rak'ahs, you perform witr with them; you pray eight rak'ahs during the day, four taslims. And if your habit was three rak'ahs, you perform witr with them at night, and you were distracted from it or prevented from it by illness, you pray four rak'ahs during the day, two taslims. And whoever adds more, there is no harm. Whoever adds to this, it is better. And this is to be done before the Dhuhr prayer. If this time is missed, it appears that it is a recommended practice whose time has passed.