وَعَنْ أَنَسٍ رضى الله عنه
قَالَ: قَالَ رَسُولُ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ -«اَلدُّعَاءُ بَيْنَ اَلْأَذَانِ وَالْإِقَامَةِ لَا يُرَدُّ»
“A supplication made between the Adhan and Iqamah is never rejected.” Related by An-Nasai and others, Ibn Hibban and others graded it as Sahih.