What is the ruling on abandoning the congregational prayer after Ramadan?

Question:
May Allah reward you, Honorable Shaykh. This person seeks advice for those who are diligent in praying with the congregation in the mosque during Ramadan, but once Ramadan ends, they are content to pray in their homes?

Answer:
This is a deprivation, and may Allah protect us from it. This is a deprivation. The congregational prayer is obligatory; it is not a recommended practice that is obligatory. Therefore, the Messenger (peace and blessings be upon him) threatened those who lag behind in it and described them as hypocrites. One is not described as a hypocrite unless he abandons an obligation. One who abandons a recommended practice is not called a hypocrite. He said, "The most severe prayers are ." Abdullah ibn Mas'ud said, "I have seen us, and none lagged behind them except a known hypocrite whose hypocrisy was well known." Yes, so this is one who abandons an obligation, and he is to be feared lest he lose the prayer gradually, because Satan proceeds gradually with a person. First, he tells him that the congregational prayer is not obligatory. Then he tells him, "Oh, it is permissible for you to combine the two prayers." Then he tells him, "The prayer is not necessary; the matter is about faith, and faith is in the heart, and it has no necessary condition of prayer." Then he abandons the prayer and becomes a disbeliever.
The congregational prayer has great benefits. As for the one who prays alone, he suffers a great deficiency and abandons an obligation that Allah has made obligatory. Why were mosques built, and why were great expenses incurred for them, and why were imams and mu'adhdhins appointed for them? Is this for something recommended or obligatory? It is an obligatory matter.