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].
App reference: Book 9, Hadith 51
English reference: Book 9, Hadith 1041
Arabic reference: Book 9, Hadith 1043