Offer collective funeral prayers for deceased persons with at least 100 people present .

This hadith teaches us about the power of collective prayer and how it can be used to benefit those who have passed away. It is narrated by 'Aishah that the Prophet said that if one hundred Muslims come together to offer funeral prayers for a deceased person, their intercession will be accepted. This means that when we pray for someone who has passed away, our prayers are heard and answered by Allah SWT. It is also important to note that this hadith does not specify any particular type of prayer or ritual; rather, it emphasizes the importance of coming together as a community in order to support each other in times of grief and loss. By doing so, we can ensure that our loved ones are remembered and honored even after they have left this world.