Say "Indeed I am fasting" when invited for a meal while you're already on fast .

This hadith is about how to politely refuse an invitation when one is fasting. The Prophet Muhammad ﷺ taught us that if we are invited to a meal and we are fasting, then we should say “Indeed I am fasting” in order to politely decline the invitation. This teaches us the importance of being polite and respectful even when declining an invitation. It also shows us that it is important for Muslims to fast during Ramadan and other times throughout the year as well.

The Prophet Muhammad ﷺ also taught us that it is important for Muslims to be kind and courteous in all situations, even when declining invitations or requests from others. We can learn from this hadith that politeness and respect should always be shown towards others, no matter what situation we find ourselves in. Additionally, this hadith reminds us of the importance of observing our religious obligations such as fasting during Ramadan or other times throughout the year as well.