Think carefully before making any promises or commitments; Speak truthfully and kindly; Be honest at all times; Take oaths seriously.

When taking an oath, the Prophet Muhammad (peace be upon him) would often say “No, by Him Who turns the hearts”. This phrase is a powerful reminder of Allah’s power and control over our lives. It is a reminder that He has control over our hearts and minds and can turn them away from evil or towards good. This hadith also serves as a warning to us not to take oaths lightly as we are accountable for our words in front of Allah. We should think carefully before making any promises or commitments so that we can fulfill them with sincerity and truthfulness.

This hadith also teaches us about the importance of being mindful of our words when speaking in general. We should always strive to speak truthfully and kindly so that we do not hurt anyone's feelings or cause any harm with our words. Furthermore, this hadith reminds us that Allah is always watching over us and knows what is in our hearts even if no one else does - so it is important for us to be honest at all times!