**'Umar bin al-Khattab (Allah is pleased with him) narrated that he addressed the people and said, 'Verily Allah has sent Muhammad with the Truth and sent down the Book to him, and the verse of stoning was included in what Allah sent down.
We recited, memorized and comprehended it. The Messenger of Allah (ﷺ) accordingly (to what was in the verse) stoned to death (whoever committed adultery while being married), and we stoned after his death.
But I am afraid that after a long time passes, someone may say, ‘We do not find the Verses of stoning in Allah’s Book, and thus they may go astray by abandoning an obligation that Allah has sent down. Verily, stoning is an obligation in the Book of Allah to be inflicted on married men and women who commit adultery, when their crime is proven, evident by pregnancy, or through the confession (of the adulterer).’**
[Sahih Al-Bukhaari and Sahih Muslim]
Imaam Al-Nawawi says:
**
( فأخشى إن طال بالناس زمان أن يقول قائل : ما نجد الرجم في كتاب الله فيضلوا بترك فريضة ) هذا الذي خشيه قد وقع من الخوارج ومن وافقهم كما سبق بيانه ، وهذا من كرامات عمر - رضي الله عنه - ويحتمل أنه علم ذلك من جهة النبي صلى الله عليه وسلم**
And I fear that if a long time passes that a person will say: We do not find Al-Rajm - stoning - in the Book of Allah, so they will become misguided by leaving an obligation.
This fear of his came true from the side of the Al-Khawaarij and those who conformed to their beliefs - the explanation of which has passed.
And this is from the karamaat of Umar (Allah is pleased with him) and it is possible that he got knowledge of that from the Prophet (sallallaahu 'alayhi wa sallam).
Reference(s):
**Sharh of Sahih Muslim by Imaam Al-Nawawi **](إسلام ويب - شرح النووي على مسلم - كتاب الحدود - باب حد الزنى- الجزء رقم11)