Anas (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said: "The supplication made between the Adhan and the Iqamah is never rejected."[Abu Dawud and At-Tirmidhi]. (ID)
App reference (ID): Book 9, Hadith 51 (ID)
English reference (ID): Book 9, Hadith 1041 (ID)
Arabic reference (ID): Book 9, Hadith 1043 (ID)