Be honest with yourself and others; Avoid telling lies; Speak truthfully; Do not fabricate stories or make false claims etc..

This hadith warns us against lying about having seen the Prophet Muhammad in our dreams. It tells us that if we do lie about this, we will be punished on the Day of Resurrection by being ordered to tie a grain of barley. This punishment may seem small and insignificant but it is actually very severe because tying a single grain would take an eternity due to its miniscule size and weight. Therefore, this hadith teaches us that even small lies can have serious consequences and should be avoided at all costs. We should also remember that lying is one of the major sins in Islam and should not be taken lightly as it can lead to dire consequences both in this life and hereafter.