Umar bin Khattab reported,

When Abdullah bin Ubayy bin Salul died, the Messenger of Allah ﷺ was called to pray over him. As the Messenger of Allah ﷺ rose, I sprang up to him and said, "Messenger of Allah, are you going to pray over Ibn Ubayy, when on such a day he said this and that?" And I began listing his words against him.The Messenger of Allah ﷺ smiled and said, "Step aside, Umar."When I kept pressing him, he said, "I was given a choice, and I made my choice. If I knew that by going beyond seventy times he would be forgiven, I would go beyond it."Umar continued, So the Messenger of Allah ﷺ prayed over him and then departed. Only a short while passed before the two verses of Baraah were revealed, "And never pray over any of them who dies" up to His words "and they died as rebels" [Tawbah 9:84].Umar said, I later marveled at my own boldness toward the Messenger of Allah ﷺ, though Allah and His Messenger know best.

Bukhari 4671

Sahih

حدثنا يحيى بن بكير حدثنا الليث عن عقيل و قال غيره حدثني الليث حدثني عقيل عن ابن شهاب قال أخبرني عبيد الله بن عبد الله عن ابن عباس

عن عمر بن الخطاب رضي الله عنه أنه قال

لما مات عبد الله بن أبي ابن سلول دعي له رسول الله ﷺ ليصلي عليه فلما قام رسول الله ﷺ وثبت إليه فقلت يا رسول الله أتصلي على ابن أبي وقد قال يوم كذا كذا وكذا قال أعدد عليه قوله فتبسم رسول الله ﷺ وقال أخر عني يا عمر فلما أكثرت عليه قال إني خيرت فاخترت لو أعلم أني إن زدت على السبعين يغفر له لزدت عليها قال فصلى عليه رسول الله ﷺ ثم انصرف فلم يمكث إلا يسيرا حتى نزلت الآيتان من براءة {ولا تصل على أحد منهم مات أبدا} إلى قوله {وهم فاسقون} قال فعجبت بعد من جرأتي على رسول الله ﷺ والله ورسوله أعلم

البخاري 4671صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Tafsir
Chapter
His saying, "Seek forgiveness for them or do not seek forgiveness for them. If you seek forgiveness for them seventy times"
Numbering
Darussalam 4671
Bukhari 4671