Hadithcore
Riyad as-Salihin, 1099

'Abdullah bin Mughaffal (May Allah be pleased with him) reported:

The Messenger of Allah (ﷺ) said, "There is a Salat (prayer) between every Adhan and Iqamah; there is a Salat between every Adhan and Iqamah." (While saying the same for the) third time (he (ﷺ) added), "It is for him who desires (to perform it)." <b>[Al-Bukhari and Muslim]</b>.

وعن عبد الله بن مغفل، رضي الله عنه، قال‏:‏ قال رسول الله صلى الله عليه وسلم‏:‏ ‏"‏بين كل أذانين صلاة، بين كل أذانين صلاة، بين كل أذانين صلاة‏"‏ وقال في الثالثة‏:‏ ‏"‏لمن شاء‏"‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏

References1 variant
In-Book Reference
Book 8, Hadith 109
Sharh · explanationclick to expand
<b>Guidance from the Hadith:</b><br> 1) Prayer between every Adhān and Iqāmah is not confirmed Rātibah prayer (a regular Sunnah); rather, it is a general supererogatory prayer.<br> 2) It shows the variety of voluntary prayers, as Allah legislated Rawātib and general supererogatory prayers, and a person can choose from them what he can do, without going beyond the Prophet’s prescribed guidance.
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