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, for whoever wishes."
حدثنا عبد الله بن محمد النفيلي حدثنا ابن علية عن الجريري عن عبد الله بن بريدة
قال رسول الله ﷺ بين كل أذانين صلاة بين كل أذانين صلاة لمن شاء
It was narrated by Bukhari, Adhan, chapter "How much time is there between the adhan and the iqamah, and who waits for the iqamah of the prayer?" h: 624, and Muslim, Prayer of the Travelers, chapter "Between every two adhans there is a prayer," h: 838, from the hadith of Saeed bin Iyas Jariri, through this same chain.