Maintain purity while praying ; Have faith in God's mercy & compassion ; Repent sincerely ; Ask for forgiveness from God .

This hadith tells us that when we are in the process of prayer or salat, the angels will continuously ask Allah to forgive us and show mercy on us as long as we have not done anything impure such as passing wind. This shows us how important it is to maintain purity while praying and how much Allah cares about our prayers. It also teaches us that even if we make mistakes during our prayer, Allah will still forgive us if we sincerely repent and ask for His forgiveness. Furthermore, this hadith also reminds us of the importance of having faith in Allah's mercy and compassion towards His servants.