This hadith is about the number of rak'ahs that should be performed while praying in Mina. According to this hadith, Prophet Muhammad and the caliphs after him used to pray two rak'ahs at Mina. However, Uthman began his caliphate by observing four rak'ahs instead of two. When Ibn Umar prayed with an Imam he also followed suit and offered four rak’ah but when praying alone he only offered two as was done by Prophet Muhammad and other caliphs before him. This hadith teaches us that we should follow the example set by our beloved prophet in all matters related to religion even if it differs from what others are doing around us because it is a sign of faithfulness towards Allah's commands and teachings which are always right no matter what people think or do around us.