Conduct transactions with honesty and fairness; Respect the rights of others regardless their social status; Do not repeat slavery today due to its immoral nature and violation of human rights;

This hadith is about the selling of slaves by Ibn Mas'ud to al-Ash'ath b. Qais, which was a common practice in those days and was accepted as a legitimate transaction in society. The hadith does not explicitly mention any values or teachings but it can be inferred that it teaches us about the importance of conducting transactions with honesty and fairness, as well as respecting the rights of others regardless of their social status or position in society. It also serves as a reminder that slavery was once an accepted practice and should not be repeated today due to its immoral nature and violation of human rights.