Anas bin Malik reported,

We were with Umar between Mecca and Medina when we tried to sight the new moon. I had sharp eyesight and spotted it, so I kept saying to Umar, "Don't you see it?"He replied, "I will see it while lying on my bed."Then he began telling us about the people of Badr. He said, "The Messenger of Allah ﷺ used to show us beforehand the spots where they would fall. He would say, 'This is where so-and-so will fall tomorrow, Allah willing, and this is where so-and-so will fall tomorrow, Allah willing.'"Umar continued, "Then they fell exactly on those spots. I said, 'By the One who sent you with the truth, they did not miss those marks.' They were struck down precisely there."Then the Prophet ﷺ gave orders concerning them, and they were thrown into a well. He went to them and called out, "So-and-so, so-and-so, have you found what your Lord promised you to be true? For I have found what my Lord promised me to be true."Umar said, "Messenger of Allah, are you speaking to a people who have already become corpses?"He replied, "You do not hear what I am saying any better than they do, but they are unable to answer."

Ahmad 182

Sahih

حدثنا يحيى بن سعيد وأنا سألته حدثنا سليمان بن المغيرة حدثنا ثابت

عن أنس قال

كنا مع عمر بين مكة والمدينة فتراءينا الهلال وكنت حديد البصر فرأيته فجعلت أقول لعمر أما تراه قال سأراه وأنا مستلق على فراشي ثم أخذ يحدثنا عن أهل بدر قال إن كان رسول الله ﷺ ليرينا مصارعهم بالأمس يقول هذا مصرع فلان غدا إن شاء الله تعالى وهذا مصرع فلان غدا إن شاء الله تعالى قال فجعلوا يصرعون عليها قال قلت والذي بعثك بالحق ما أخطئوا تيك كانوا يصرعون عليها ثم أمر بهم فطرحوا في بئر فانطلق إليهم فقال يا فلان يا فلان هل وجدتم ما وعدكم الله حقا فإني وجدت ما وعدني الله حقا قال عمر يا رسول الله أتكلم قوما قد جيفوا قال ما أنتم بأسمع لما أقول منهم ولكن لا يستطيعون أن يجيبوا

أحمد 182صحيح
Contents
Reference
Commentary
Ayat
Collection
Musnad Ahmad
Book
Umar bin Khattab
Numbering
Darussalam 182
Ahmad 182