Some Companions of the Prophet ﷺ reported,

The Messenger of Allah ﷺ came out and ascended the pulpit. He pronounced the testimony of faith, and when he had finished, the first words he spoke were to seek forgiveness for the martyrs who had been killed at the Battle of Uhud. Then he said, "A servant from among the servants of Allah has been given the choice between this world and what is with his Lord, and he has chosen what is with his Lord."Abu Bakr al-Siddiq was the first of the people to grasp the meaning, realizing that the Messenger of Allah ﷺ was referring to himself, and so he wept.The Messenger of Allah ﷺ said to him, "Take it easy, Abu Bakr. Close these doors that open onto the mosque, except for the door of Abu Bakr, for I know of no one among the Companions whose companionship and support has been more excellent to me than that of Abu Bakr."

Azami 9831

Sahih

عن بعض أصحاب النبي ﷺ

أن رسول الله ﷺ خرج فاستوى على المنبر، فتشهد فلما مضى تشهده كان أول كلام تكلم به أن استغفر للشهداء الذين قتلوا يوم أحد، ثم قال: إن عبدا من عباد الله خير بين الدنيا وبين ما عند ربه فاختار ما عند ربه، ففطن لها أبو بكر الصديق أول الناس فعرف أنما يريد رسول الله ﷺ نفسه، فبكى أبو بكر، فقال له رسول الله ﷺ: على رسلك يا أبا بكر! سدوا هذه الأبواب الشوارع في المسجد إلا باب أبي بكر، فإني لا أعلم أمرا أفضل عندي يدا في الصحابة من أبي بكر.

الأعظمي 9831صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Virtues of the Companions and reports about them
Chapter
Virtues of Abu Bakr and his reports
Section
Abu Bakr was the most generous of people to the Prophet ﷺ in his companionship and wealth
Numbering
Jami al-Kamil 9831 (2nd edition)
Azami 9831