The two rak'ahs of greeting the mosque for one who leaves to renew his wudu'

Question:
Honorable Shaykh, may Allah grant you success. He says: If I leave the mosque in order to renew my wudu' or to perform wudu', is it obligatory for me, when I return, to pray two rak'ahs for entering the mosque?

Answer:
First, the greeting of the mosque is not obligatory. I am telling you, is it obligatory? No, nothing is obligatory except the prescribed obligatory prayers; the prescribed prayer is what is obligatory. As for the greeting of the mosque, it is recommended, not prescribed or obligatory. Second, if you leave with the intention of returning soon, is the greeting of the mosque required of you? No, because you are considered to be still in the mosque. Yes.