Is it permissible to pray a voluntary prayer of four rak'ahs in the daytime with a single taslim?

The questioner:
He says: Honorable Shaykh, may Allah grant you success, is it permissible for a Muslim to voluntarily pray four connected rak'ahs with a single taslim in the daytime?

The Shaykh:
It is permissible. One may pray four rak'ahs in the daytime, but he sits for the first tashahhud as in the Zuhr prayer. They said that if one voluntarily prays four rak'ahs in the daytime like the Zuhr prayer, there is no harm; because the prayer that is performed in pairs of two is the night prayer, whereas in the daytime there is no harm in increasing beyond pairs of two. However, there is a narration that the night and day prayers are performed in pairs of two. Based on this, one prays in pairs of two even in the daytime. This is the ruling by which Shaykh 'Abd al-'Aziz ibn Baz (may Allah have mercy on him) issues fatwas.

The questioner:
He says: Honorable Shaykh, may Allah grant you success, and is that permissible in the rawatib of the Zuhr prayer that one prays before the obligatory prayer?

The Shaykh:
The rawatib of the Zuhr prayer, regarding which it is reported that it is with two taslims, is prayed with two taslims and not combined. This applies only to the absolute voluntary prayer. Those who said it is permissible said so regarding the absolute voluntary prayer. As for the restricted voluntary prayer, it is performed as it was transmitted.