Surah Saba 34:11

أَنِ ٱعْمَلْ سَـٰبِغَـٰتٍ وَقَدِّرْ فِى ٱلسَّرْدِ ۖ وَٱعْمَلُوا۟ صَـٰلِحًا ۖ إِنِّى بِمَا تَعْمَلُونَ بَصِيرٌ

[Commanding him], "Make full coats of mail and calculate [precisely] the links, and work [all of you] righteousness. Indeed I, of what you do, am Seeing."

Translation: Saheeh International

Tafsir

And We said ‘Fashion from it long coats of mail — complete suits of armour which the person wearing it drags behind him along the ground — and measure well the links’ that is in the weaving of the coats the maker of these is called sarrād. In other words make them so that the rings thereof are arranged properly. …

Excerpt from Tafsir al-Jalalayn, commentary on 34:11, via Quran.com. The reader has the full commentary and 9 more tafsirs.