Jami` at-Tirmidhi 212
جامع الترمذي#212SahihAnas bin Malik narrated that :Allah's Messenger said: "The supplication made between the Adhan and Iqamah is not rejected
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 2:64