Abdullah bin Abbas reported,

I heard Umar bin Khattab say, "Stoning is prescribed in the Book of Allah as a due penalty upon any man or woman who commits adultery after marriage, when the evidence is established, or pregnancy occurs, or there is a confession."

Azami 6937

Sahih

عن عبد الله بن عباس أنه قال

سمعت عمر بن الخطاب يقول: الرجم في كتاب الله حق على من زنى من الرجال والنساء إذا أحصن، إذا قامت البينة، أو كان الحبل، أو الاعتراف.

الأعظمي 6937صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Legal punishments
Chapter
Hadd of zina
Section
Affirmation of stoning the married adulterer in the Book of Allah and the Sunnah of the Messenger of Allah ﷺ
Numbering
Jami al-Kamil 6937 (2nd edition)
Azami 6937