Prayer is a Tawqifiyyah (determined) act of worship. The Prophet (may Allah's peace and blessings be upon him) taught us the way of performing it and its Sunnahs and etiquettes. This Hadīth presents part of the Prophet's guidance in the prayers of the two Eids. The Tābi‘i ‘Ubaydullāh ibn ‘Abdullāh ibn ‘Utbah ibn Mas‘ūd al-Hudhali says that ‘Umar ibn al-Khattāb (may Allah be pleased with him) asked the Companion Abu Wāqid al-Laithi (may Allah be pleased with him) about what the Prophet (may Allah's peace and blessings be upon him) used to recite after Al-Fātihah in the two Rak‘ahs of Eid al-Fitr and Eid al-Ad'ha. ‘Umar's question about this matter - the like of which was not unknown to him - may be rooted in the desire that he should tell him whether he memorized it or not, or he may have entertained doubt, or he may have been in dispute with someone else over this matter, and so he wanted to cite his statement, or he may have forgotten it. In response, Abu Wāqid (may Allah be pleased with him) told him that the Prophet (may Allah's peace and blessings be upon him) used to recite in the first Rak‘ah Surat Qāf, which begins with: {Qāf. By the Glorious Qur’an!} And in the second Rak‘ah, Surat al-Qamar, which starts with: {The Hour has drawn near and the moon has split asunder.} The wisdom behind reciting them lies in the fact that they both contain information related to the Resurrection, the past nations, the destruction of the deniers, and the resemblance of people emerging for Eid to their emerging for the Resurrection and their coming out of the graves like scattered locusts - and Allah knows best. In the Hadīth: If anyone finds any of the matters of knowledge confusing or unclear to him, he should ask a knowledgeable person about it..