This Hadīth is known as “The Hadīth of the one harming his prayer”. Commentators quote this Hadīth when describing the obligatory acts and conditions of the prayer. In this Hadīth, the Prophet (may Allah's peace and blessings be upon him) taught perfectly the components of the prayer that must be present. Anything that is not mentioned in this Hadīth is not considered obligatory. In general, this Hadīth relates an incident where a Companion called Khallad ibn Rāfi‘ entered the mosque after the Prophet (may Allah's peace and blessings be upon him) and performed prayer without perfecting its actions and words. When the man had finished his prayer, he came to greet the Prophet (may Allah's peace and blessings be upon him) with the greeting of peace. The Prophet (may Allah's peace and blessings be upon him) replied to him and said: “Go back and pray again, for you have not prayed.” The man returned and prayed in the same way he had done before. He then went to the Prophet (may Allah's peace and blessings be upon him) who told him to go back and pray again, for he had not prayed. On the third time, the man said: “I swear by the One who sent you with the Truth, I cannot pray better than this! Please, teach me how to do it.” As the man had a thirst for knowledge and was still prepared to gain it after going back and forth, the Prophet (may Allah's peace and blessings be upon him) said to him: “When you want to pray, say the Takbīr of Ihrām (to initiate the prayer) and recite whatever is convenient to you from the Qur’an after Sūrat al-Fātihah. Then bow until you are at ease in bowing and then rise until you are standing up straight. Then prostrate until you are at ease in prostration and then sit up until you are at ease in sitting. Then do that throughout the whole prayer, except for the Takbīr of Ihrām, which is only said in the first Rak‘ah. The other versions of the Hadīth listed a couple of other conditions for prayer, such as facing the Qibla (prayer direction) and performing ablution.