Conveying Islam and teaching it to people is obligatory for every Muslim, commensurate with his knowledge and ability to do that. In this hadith, Abu Hurayrah (may Allah be pleased with him) gives the best example of that and does his duty of conveying Islam and teaching knowledge to the people, and not withholding or concealing knowledge. Here he is speaking about prayer, and he tells us that the worshipper must recite Qur’an in every prayer, but in some of the prayers he must recite out loud, when reciting al-Fatihah and whatever else he can of Qur’an. In other prayers, he must recite quietly, in a low voice. All of that is to be based on the actions of the Messenger of Allah (blessings and peace of Allah be upon him), who recited out loud in Fajr prayer, and in the first two rak‘ahs of Maghrib and ‘Isha’, and he used to recite quietly in all other cases. In the supererogatory night prayers [qiyam al-layl] he sometimes recited quietly and sometimes recited out loud, as is mentioned in a hadith narrated by al-Tirmidhi from ‘A’ishah (may Allah be pleased with her). The Sahabah (may Allah be pleased with them) followed him (blessings and peace of Allah be upon him) in that, and those who came after them followed them. Thus they recited out loud in the parts of the prayer in which the Prophet (blessings and peace of Allah be upon him) recited out loud, and they recited quietly in the parts in which the Prophet (blessings and peace of Allah be upon him) recited quietly. Then Abu Hurayrah (may Allah be pleased with him) explained that what is required in terms of recitation is to recite the Essence of the Qur’an, which is al-Fatihah. It is called the Essence of the Qur’an because it includes all the meanings of the Qur’an, and because it is the first surah of the Qur’an. So whoever recites al-Fatihah has done what is required of him, and his prayer is valid, but whoever adds to that recitation whatever he can of Qur’an, that is regarded as supererogatory and the one who does this will be rewarded for it. This hadith highlights the importance of following the Sunnah of the Prophet (blessings and peace of Allah be upon him) and avoiding innovation, and being keen to emulate the practice of the Prophet (blessings and peace of Allah be upon him). It indicates that it is obligatory to recite al-Fatihah in every prayer, whether the prayer is one in which recitation is to be done out loud or one in which it is to be done quietly..