Is the greeting of the mosque obligatory or recommended?

Question:
What is the factor that removes the obligation of the greeting of the mosque?

Answer:
His statement (peace and blessings be upon him) to the one who asked him about the five prayers, "Is there anything else required of me?" He said: This is the proof of the majority.
Q: Is the command regarding the greeting of the mosque something that comes after the statement of the Messenger (peace and blessings be upon him)?
The Shaykh: It is possible. In any case, the believer does not leave it. The believer prays it, and praise be to Allah. He does not leave it. He does not be lax. When he enters the mosque, he prays two rak'ahs.
Q: What about one who leaves the mosque and then, after a short time, feels like returning?
The Shaykh: He prays the greeting. Or if he went to perform wudu' and left to perform wudu', he prays two rak'ahs for the greeting and for the wudu'.
Q: But what if he left without the intention of returning and then felt like returning?
The Shaykh: When he enters, he prays two rak'ahs.