The ruling on praying with someone who missed the congregation, while the other prayed alone

Question:
Honorable Shaykh, may Allah grant you success, is it permissible for me to pray with someone who missed the congregational prayer, so that I count it as charity for him, but this is in a state of prohibition?

Answer:
No, if he has no one with him to pray with, he prays alone. If you want to pray with him so that it becomes a congregation, there is no harm, because those who came to the mosque of al-Khayr, where the Messenger of Allah (peace and blessings be upon him) used to pray the Fajr prayer for the Muslims, and they sat down, he rebuked them for having prayed Fajr, and he ordered them to pray with the praying people and not sit behind them, so that it would be beneficial for them. They had already prayed, so this was the ruling for them, but the Prophet (peace and blessings be upon him) ordered them to repeat the congregation so that it would be beneficial for them. However, if they already have a congregation and they have a need for you, no, do not pray with them.