Be moderate with your clothing and accessories; avoid extravagance or vanity; follow the teachings of Prophet Muhammad .

This hadith is about the prohibition of wearing luxury clothing and silk, which was narrated by Abu 'Uthman. It was said that a letter came to them from Umar when they were in Azerbaijan, warning them against wearing such clothing. The Prophet Muhammad then forbade them from wearing silk and held up two fingers to indicate how much they could wear. This hadith teaches us that we should not be extravagant with our clothing or accessories, as it can lead to pride and arrogance. We should also be mindful of what we wear in order to avoid any form of extravagance or vanity.