What is the ruling on leaving the regular voluntary prayers (rawatib)?

Question : I want to learn. She says she is careful to maintain the Witr prayer, but she leaves the regular voluntary prayers (rawatib).

Answer : There is no blame on her for that, because the regular voluntary prayers (rawatib) are voluntary; if a person performs them, he is rewarded, and if he leaves them, he is not punished. But I say to this woman: be careful to perform the rawatib, because the rawatib patch up the defects in the obligatory prayers and complete them. And the rawatib are not many, praise be to Allah: twelve rak'ahs of prayer in a day and night. For whoever prays them, Allah builds for him a house in Paradise: four before the midday prayer (Zuhr) with two taslims—before the midday prayer means before the Zuhr prayer and after the adhan—and two after it, two after the sunset prayer (Maghrib), two after the night prayer ('Isha'), and two before the dawn prayer (Fajr). These make ten rak'ahs. Now, a final question. Let her maintain them, for if she prays them in a day, Allah builds for her a house in Paradise. And regarding overcoming laziness.
For it is Shaytan who holds one back from doing good deeds, and encourages one to do wrong deeds, and to leave voluntary acts and obedience. Yes.