Have the intention of fasting before dawn

According to this hadith narrated by Hafsah, it is essential for a person to have the intention of fasting before dawn in order for their fast to be valid. This means that if someone does not have the intention of fasting before dawn then their fast will not be accepted and they will not receive any reward from Allah. This hadith teaches us that we should always make sure that our intentions are pure and sincere when performing any act of worship so that we can receive its full reward from Allah. It also reminds us to always think ahead and plan our actions in advance so that we can make sure our intentions are correct when performing an act of worship such as fasting.