Abdullah bin Umar reported,

While we were praying with the Messenger of Allah ﷺ, a man from the group said, "Allah is the Greatest, abundant praise. Praise be to Allah in abundance. Glory be to Allah morning and evening."The Messenger of Allah ﷺ asked, "Who said such and such words?"A man from the group replied, "I did, Messenger of Allah."He said, "I marveled at them. The gates of heaven were opened for them."Ibn Umar said, "I have not abandoned saying these words since I heard the Messenger of Allah ﷺ say that."

Azami 10995

Sahih

عن ابن عمر قال

بينما نحن نصلي مع رسول الله ﷺ إذ قال رجل من القوم: الله أكبر كبيرا، والحمد لله كثيرا، وسبحان الله بكرة وأصيلا، فقال رسول الله ﷺ: من القائل كلمة كذا وكذا؟ فقال رجل من القوم: أنا يا رسول الله! قال: عجبت لها، فتحت لها أبواب السماء. قال ابن عمر: فما تركتهن منذ سمعت رسول الله ﷺ يقول ذلك.

الأعظمي 10995صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Supplications, remembrances, and prayer upon the chosen Prophet ﷺ
Chapter
Supplications of adhan and prayer, and what is related to them
Section
What is said of the opening supplications after the takbir of ihram
Numbering
Jami al-Kamil 10995 (2nd edition)
Azami 10995