their ḥijzah (waist), and among them are those it reaches to their tarqūwah (collarbones).

(al-ḥijzah): the spot where one ties the waist-wrap, just below the navel.
(at-tarqūwah), with an open tāʾ and a ḍammah on the qāf: the bone situated at the hollow of the throat; every person has two collarbones on either side of the neck.

5/400 – Ibn ʿUmar (may Allah be pleased with them both) reported that the Messenger of Allah ﷺ said, “People will stand before the Lord of the Worlds until one of them is immersed in his rashḥ (perspiration) up to the middle of his ears.” Agreed upon.

6/401 – Anas (may Allah be pleased with him) said: The Messenger of Allah ﷺ delivered a sermon the like of which I had never heard before. He said, “If you knew what I know, you would laugh little and weep much.” The Companions of the Messenger of Allah ﷺ thereupon covered their faces, and they were overcome with khanīn (sobbing). Agreed upon.

In another wording: Some report concerning his Companions reached the Messenger of Allah ﷺ, so he delivered a sermon and said, “Paradise and Hell have been displayed before me, and I have never seen the like of today in good and in evil. If you knew what I know, you would laugh little and weep much.” Never had a day come upon the Companions of the Messenger of Allah ﷺ more distressing than that; they covered their heads and were filled with khanīn.

(al-khanīn), with a khāʾ: weeping accompanied by a humming sound and a nasal intake of breath.