Be mindful and aware of your prayers; Seek guidance from Allah when you are confused or uncertain; Seek knowledge from reliable sources so as not to make mistakes in your worship; Prostrate twice after saying taslim if you have doubt during your prayer .

The hadith of 'Abdullah bin Ja'far teaches us that if we have any doubts or confusion while praying, we should prostrate twice after saying the taslim. This is a reminder to us to be mindful and aware of our prayers and to take extra care in ensuring that our prayers are done correctly. It also encourages us to seek guidance from Allah when we are confused or uncertain about something. By doing this, it will help us stay focused on our prayer and ensure that it is done properly according to Islamic teachings. Additionally, this hadith reminds us of the importance of seeking knowledge from reliable sources so as not to make mistakes in our worship.