The Regular Voluntary Prayers

Question: What are the regular voluntary prayers performed before and after the obligatory prayers?

Answer: The regular voluntary prayers performed with the obligatory ones, are as explained in the hadith of 'Abdullah ibn 'Umar (may Allah be pleased with them both), who said:
These are the regular voluntary prayers performed with the obligatory ones. One should strive to maintain them, except when traveling. In the state of travel, these regular voluntary prayers are not performed; rather, one restricts oneself to the obligatory prayer, shortening the four-rak'ah prayers to two rak'ahs. However, the two rak'ahs of Fajr are an exception, for the Prophet (peace and blessings be upon him) used to maintain them whether resident or traveling, just as he maintained the witr prayer whether resident or traveling. In some hadiths, there are four rak'ahs before Zuhr in addition to the two rak'ahs, making four rak'ahs before Zuhr, while the other prayers are two rak'ahs each, namely Maghrib, 'Isha', and Fajr.