Is it permissible to declare a person a hypocrite because he did not attend the Fajr prayer?

The questioner : Regarding the one who declares a person who misses the Fajr or 'Asr prayer to be a hypocrite, meaning actual hypocrisy, saying "you are a hypocrite because you did not attend these two prayers," I do not know, O Shaykh, what the ruling on this is, along with your advice to the one who accuses him?

The Shaykh : With advice to whom?

The questioner : To the one who accuses the brother?

The Shaykh : Ah, yes. The hadith on this is well known in the Sunnah that the 'Isha' and Fajr prayers are the most difficult prayers for the hypocrites. However, declaring a specific person, such as Zayd, to be a hypocrite, we do not consider this permissible, unless it is established with certainty that he has no excuse. In that case, the treatment is not by applying the term "hypocrite" to him, but by reminding him and advising him repeatedly, time after time. If it becomes clear that he does not respond to the reminders of those who remind him and the advice of those who advise him, then there is no doubt, in this situation, that it is permissible to apply the term "hypocrite" to him, as long as it is established that he has no legal excuse. For he then falls under the general statement of the jurist poet, or the poet jurist, who said:
"Criticism is not backbiting in six cases: *** The aggrieved, the one seeking knowledge, and the one warning
"And the one who openly commits open sinfulness, and the one who seeks assistance in removing what is wrong"
This is the answer to the last question, and praise be to Allah, Lord of the worlds.

The questioner : May Allah reward you with good, O Shaykh.

The Shaykh : And to you.