Do good deeds and strive not to betray anyone.

On the day of judgement, everyone will be judged for their actions in this life. The Prophet Muhammad ﷺ said that those who have betrayed others in this life will have a flag raised above them to signify their betrayal. This flag is meant to remind people of what they did and how it was wrong so that they can repent and ask for forgiveness from Allah SWT. This hadith teaches us that we should always strive to do good deeds and not betray anyone because our actions are being watched by Allah SWT and He knows all things. We should also remember that on the day of judgement, we will all be held accountable for our deeds so it is important to make sure we are doing good things now so as not to regret them later.