Abdullah bin Mughafal reported,

The Messenger of Allah ﷺ said, "Between every two calls to prayer there is a prayer, between every two calls to prayer there is a prayer, between every two calls to prayer there is a prayer, for whoever wishes."

Azami 2462

Sahih

عن عبد الله بن مغفل: قال

قال رسول الله ﷺ: عند كل أذانين صلاة، عند كل أذانين صلاة، عند كل أذانين صلاة لمن شاء.

الأعظمي 2462صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Prayer
Chapter
Sunnah prayers and voluntary prayers in general
Section
There being a prayer between every two adhans
Numbering
Jami al-Kamil 2462 (2nd edition)
Azami 2462