1097/1 - Ramlah bint Abi Sufyān, wife of the Prophet, also known as Um Habībah (may Allah be pleased with her) reported that she heard the Prophet (may Allah’s peace and blessings be upon him) say: “No Muslim prays to Allah Almighty every day 12 Rak‘ahs on a voluntary basis, apart from the obligatory prayers, except that Allah will build for him a house in Paradise - or a house will be built for him in Paradise.” [Narrated by Muslim]
1098/2 - Ibn ‘Umar (may Allah be pleased with him and his father) reported: “I prayed with the Messenger of Allah (may Allah’s peace and blessings be upon him) two Rak‘ahs before the Zhuhr prayer, two Rak‘ahs after it, two Rak‘ahs after the Friday prayer, two Rak‘ahs after the Maghrib prayer, and two Rak‘ahs after the ‘Ishā’ prayer.” [Narrated by Al-Bukhāri and Muslim]
1) Supererogatory prayers are among the best virtues. If a person performs them regularly every day, Allah will build for him a house in Paradise.
2) The Rawātib (regular Sunnah prayers) are 12 Rak‘ahs, to be offered along with the obligatory prayers.
3) Allah Almighty is merciful towards His believing servants who offer the prayer, as He opens to them the gates to goodness so that they can reap abundant rewards.
1099/3 - ‘Abdullāh ibn Mughaffal (may Allah be pleased with him) reported that the Prophet (may Allah’s peace and blessings be upon him) said: “There is a prayer between every two Adhāns; there is a prayer between every two Adhāns; there is a prayer between every two Adhāns.” In the third time, he said: “for whoever wills.” [Narrated by Al-Bukhāri and Muslim] The two Adhāns refer to the Adhān (first call to prayer) and Iqāmah (second call to prayer).
1) Prayer between every Adhān and Iqāmah is not confirmed Rātibah prayer (a regular Sunnah); rather, it is a general supererogatory prayer.
2) It shows the variety of voluntary prayers, as Allah legislated Rawātib and general supererogatory prayers, and a person can choose from them what he can do, without going beyond the Prophet’s prescribed guidance.