On the authority of Anas, from the Prophet, peace and blessings be upon him, who said: "The supplication is not rejected between the call to prayer and the iqamah." (1)

And likewise, Abu Ishaq al-Hamdani narrated this hadith from Burayd ibn Abi Maryam, from Anas, from the Prophet, peace and blessings be upon him, similar to this, and this is more authentic.

145 - Chapter

3913 - Abu Kurayb Muhammad ibn al-'Ala' narrated to us, saying: Abu Mu'awiyah narrated to us, from 'Umar ibn Rashid, from Yahya ibn Abi Kathir, from Abu Salamah, from Abu Hurayrah, who said: The Messenger of Allah, peace and blessings be upon him, said: "The mufarridun have preceded." They said: "And who are the mufarridun, O Messenger of Allah?" He said: "Those who are devoted to the remembrance of Allah. The remembrance removes their burdens, and they come on the Day of Resurrection light." (2)

This is a hasan gharib hadith.

3914 - Abu Kurayb narrated to us, saying: Abu Mu'awiyah narrated to us, from al-A'mash, from--------------------------------------------
(1) A sahih hadith, and its chain has been previously cited under number (210), and see what precedes it.
(2) A sahih hadith, and Muslim recorded it (2676), and it is in al-Musnad (8290), and Sahih Ibn Hibban (858).
His saying: "al-mufarridun": it is said: farada bi-ra'yihi, and afrada, and farrada, and istafrada: all with the meaning of being alone with it. And it is said: farrada al-rajul: when he devoted himself to religious understanding and withdrew from people, and secluded himself in observing the command and the prohibition. And it is said: they are the elderly whose peers among people have perished and they remained remembering Allah. "Al-Nihayah" 3/426.
And "al-mustah tarun bi dhikr Allah": those who are enamored with it. It is said: uh tira so-and-so with such-and-such, and ustuh tira, so he is muhtar and mustah tar, meaning: devoted to it, not speaking of anything else, nor doing anything else. "Al-Nihayah" 5/242-243.