The Messenger of Allah ﷺ said, "Supplication made between the adhan and the iqamah is not rejected, so make supplication."
قال رسول الله ﷺ: إن الدعاء لا يرد بين الأذان والإقامة فادعوا.
Abu Dawud (521), Tirmidhi (212), and Nasai in Al-Yawm wal-Laylah (68, 69, 70) all narrated it through various routes from Zayd Ammi, from Abu Iyas, from Anas bin Malik, and he related the hadith. Tirmidhi said, hasan, and in one copy, hasan sahih. The first is closer to being correct, because its chain contains Zayd Ammi, that is, Zayd bin Hawari, Abu Hawari Basri. There is disagreement about the reason for this designation. Some say he is named after "Banu Amm," a clan of Banu Tamim. Ali bin Musab said he was called Ammi because whenever he was asked about something he would say, "Until I ask my uncle (ammi)." He is daif, having been declared daif by Abu Hatim, Nasai, Ibn Saad, and Ibn Madini. Ibn Hibban said, he narrates from Anas fabricated hadiths with no basis. Someone like him cannot have his hadith graded hasan, let alone sahih.However, the hadith has other routes, and for this reason I have included it in the Jami. Among these routes is what Ahmad narrated in his Musnad (12584), where he said, Aswad and Husayn bin Muhammad narrated to us, they said, Israil narrated to us, from Abu Ishaq, from Burayd bin Abu Maryam, from Anas, and he related the hadith. Abu Yaala also narrated it (3679) through the route of Israil, with the same wording, and Tirmidhi alluded to it by saying, "Abu Ishaq Hamdani has narrated it, from Burayd bin Abu Maryam, from Anas, from the Prophet ﷺ, similar to this."Its narrators are trustworthy except for Abu Ishaq, who is Amr bin Abdullah Sabi, well known by his kunya. He is a trustworthy successor, but he used to practice tadlis (concealment in transmission). However, he is corroborated by his son Yunus, for Ahmad narrated it (13357) from Ismail bin Umar, who said, Yunus, that is, the son of Abu Ishaq, narrated to us, saying, Burayd bin Abu Maryam narrated to us, from Anas, and he related it.Yunus bin Abu Ishaq is truthful, and through this same route Ibn Khuzayma also transmitted it in his Sahih (426, 427), saying, he means the answered supplication.