كتاب الصلاة
2  
The Book of Prayer
Bulugh al-Maram 203
Narrated Anas bin Malik (RA):
Allah's Messenger (ﷺ) said: "A supplication made between the Adhan and Iqamah is not rejected." [Reported by an-Nasa'i and Ibn Khuzaimah graded it Sahih (authentic)].
وَعَنْ أَنَسٍ ‏- رضى الله عنه ‏- قَالَ : قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ لَا يُرَدُّ اَلدُّعَاءُ بَيْنَ اَلْأَذَانِ وَالْإِقَامَةِ } رَوَاهُ النَّسَائِيُّ , وَصَحَّحَهُ اِبْنُ خُزَيْمَةَ .‏ 1‏ .‏
Reference : Bulugh al-Maram 203
In-book reference : Book 2, Hadith 203
English translation : Book 2, Hadith 203
Hadith Text
Reference