A man entered the mosque a short time before the Maghrib adhan; what should he do?

Question:
(peace and blessings be upon him). If a man enters the mosque and it is five minutes until the Maghrib adhan, does he pray the greeting of the mosque, or does he wait until the adhan? And is prayer before the adhan performed absolutely, or must he wait for the adhan?

Answer:
If he enters the mosque a short time before the Maghrib adhan, he waits. He waits standing, not sitting, but standing until the adhan is called, then he prays the greeting of the mosque. However, if he enters the mosque after 'Asr and there is a long time remaining until the Maghrib adhan, there is a difference of opinion among the scholars. Some say he prays two rak'ahs as the greeting of the mosque, because it is one of the prayers with a cause. Prayers with a cause are performed when their cause is present, even in a time of prohibition.
Some scholars say no; if he enters the mosque after 'Asr and there is a long time remaining until Maghrib, he sits and does not pray, because this is a time of prohibition. Yes, in any case, whoever prays has done correctly and has a reward, and whoever sits has an excuse and there is no blame on him. Yes.