Does the Fajr sunnah suffice in place of the greeting of the mosque?

Question:
This message reached us from Najih Masilh Abdullah, from the State of Bahrain. It says: What is the ruling for one who enters the mosque after the dawn has appeared? Does he pray the sunnah of the greeting of the mosque, or is it sufficient for him to rely on the Fajr sunnah?
May Allah guide you.

Answer:
It is better that he relies on the Fajr sunnah, and it takes the place of the greeting, just as the obligatory prayer takes the place of the greeting. If he arrives and the prayer has already been called for, he prays with them, and the obligatory prayer stands in place of the greeting of the mosque.
What is prescribed is that one does not sit except after praying. So if he prays the Fajr sunnah, it suffices. And if he arrives while the prayer is being called for, the obligatory prayer suffices for him in place of the greeting of the mosque. If he prays both, he prays the greeting first, then the Fajr sunnah, and there is no blame on him. But leaving this is preferable. The preferable and better thing is that he prays the Fajr sunnah, meaning the regular voluntary prayer, and relies on it in place of the greeting prayer; because the Messenger of Allah (peace and blessings be upon him) used to pray only two rak'ahs after the dawn, and he did not increase beyond two rak'ahs after the dawn appeared, and that is the Fajr sunnah.
So the better thing is: that we do not increase beyond the two rak'ahs. If we pray them with the intention of the Fajr sunnah, they suffice in place of the greeting of the mosque. Yes.
But if he prays the regular voluntary prayer in his house, he prays the Fajr sunnah in his house, then comes to the mosque before the prayer is called for; then he prays the greeting of the mosque at that time before he sits; because at that time he does not have the Fajr sunnah, he has already prayed it in his house, so he prays the greeting of the mosque, then he sits. Yes.