Surah Al-Qiyamah 75:29

وَٱلْتَفَّتِ ٱلسَّاقُ بِٱلسَّاقِ

And the leg is wound about the leg,

Translation: Saheeh International

Tafsir

and the shank is intertwined with the other shank that is one of his shanks will be intertwined with his other shank at the moment of death; or it means the distress of parting with this world is intertwined with the distress of the arrival of the Hereafter;

Excerpt from Tafsir al-Jalalayn, commentary on 75:29, via Quran.com. The reader has the full commentary and 9 more tafsirs.