What to do when you enter the Masjid and the Muadhdhin is giving the Adhaan?

بـسـم الله والحـمـد لله والـصلاة والـسـلام عــلى رسـول الله، وبـعـد

Shaikh al-`Uthaymeen رحمه الله was asked:

Question: If I enter the Masjid and the Muadhdhin (the caller) is giving the Adhaan (i.e. calling for prayer). So, should I follow the Muadhdhin (in repeating the Adhaan) or should I offer the Tahiyaat al-Masjid?

Answer: If a person enters the Masjid and the Muadhdhin is giving the Adhaan other than the second Adhaan for Jumu`ah (i.e. it may be the Adhaan for Fajr, Dhuhr, `Asr or the first Adhaan of Jumu`ah etc.), then he should answer (repeat with) the Muadhdhin.

But if it is the second Adhaan for Jumu`ah, then he should not repeat with the Muadhdhin. Rather, he should offer the Tahiyaat al-Masjid, so that he can free himself to hear the Khutbah; because hearing the Khutbah is Waajib (compulsory), but answering (repeating with) the Muadhdhin is Sunnah (optional).

[Shaikh al-`Uthaymeen, Fataawa Noorun `ala al-Darb]