shuhrah—conspicuous attire that makes one stand out—and the Prophet ﷺ expressly forbade wearing garments of shuhrah.

These same ḥadiths also show that the sleeve of the qamīṣ (tunic) should reach the rusgh, the midpoint between the kūʿ and the karsūʿ. A person has a mirfaq (elbow), the joint between the upper arm and the forearm, and on the forearm three named points: kūʿ, karsūʿ, and rusgh. The kūʿ is the end of the forearm next to the palm on the thumb side; the karsūʿ is the end next to the palm on the little-finger side; the rusgh is what lies between them. In the words of the mnemonic poet:

“The bone beside the thumb is the kūʿ, and next to the little finger is the karsūʿ; the rusgh is the space between.
A bone beside the big toe is called the būʿ—so take this knowledge and beware of error.”

When ordinary people wish to describe someone as foolish, they say, “This fellow doesn’t know his kūʿ from his karsūʿ.” Most people mistakenly think the kūʿ is the elbow, the limit reached in wuḍūʾ, but that is not so: the prominence of the forearm nearest the palm on the little-finger side is the karsūʿ, the one on the thumb side is the kūʿ, and the rusgh is between them. The Prophet ﷺ wore his tunic sleeves down to the rusgh. After this, the author quotes the ḥadith of Ibn ʿUmar and the ḥadith of Abū Hurayrah (may Allah be pleased with them).