The ruling on praying Witr at the beginning of the night and praying after it

This is a letter we received from Nida' Abd al-Jalil. My mother says in the letter: My mother prays 'Isha' with Witr, then sleeps and prays a prayer before the Fajr prayer. Many people tell her: It is not permissible for you to pray Witr as long as you have a prayer before the Fajr prayer. Please inform us, may Allah reward you?
Answer: It is better for her to delay Witr to the end of the night, as long as she stands in prayer at the end of the night. It is better that her Witr be at the end of the night, after she prays the prayer that Allah has written for her; based on the saying of the Prophet (peace and blessings be upon him): . This is the best: that the prayer be at the end of the night, and she concludes with Witr if that is facilitated.
However, if she fears that she will not be able to stand in prayer at the end of the night, and she wants to exercise caution, she may pray Witr at the beginning of the night, and there is no harm in that. The Prophet (peace and blessings be upon him) advised Abu Hurayrah and advised Abu al-Darda' to pray Witr at the beginning of the night. Some scholars said: This is because they were studying hadith and feared they would not be able to stand in prayer at the end of the night, so he advised them to pray Witr at the beginning of the night.
And it is authentic from him (peace and blessings be upon him) that he said: , which Muslim recorded in his Sahih.
This is the detailed ruling: If the woman is able to stand in prayer at the end of the night, it is better for her Witr to be at the end of the night, after she prays what Allah has written for her, and then she prays Witr before Fajr. This is the best. But if she fears that she will not be able to stand in prayer or wake up, it is better for her to pray Witr at the beginning of the night. If she stands in prayer at the end of the night and Allah facilitates it for her, she prays whatever is easy: two rak'ahs, or four rak'ahs, or six rak'ahs, without Witr. The first Witr is sufficient, and she does not repeat the Witr; because the Prophet (peace be upon him) said: . So if a person prays Witr at the beginning of the night, and then Allah facilitates for him standing in prayer at the end of the night, he does not repeat the Witr. Rather, the first Witr is sufficient for him, and he prays whatever is easy at the end of the night: two rak'ahs, or four rak'ahs, or more than that, without Witr. Yes.