The Excellence of Optional Prayers (Sunnah Mu'akkadah) along with the Obligatory Prayers

Ibn 'Umar (May Allah be pleased with them) reported:
I performed along with the Messenger of Allah ﷺ two Rak'ah of optional prayers before Zuhr and two after the Zuhr (noon prayer), and two after the Friday prayer, and two after the Maghrib (evening) prayer, and two after the 'Isha' (night) prayer."

[Al-Bukhari and Muslim].

وعن ابن عمر رضي الله عنهما، قال: صليت مع رسول الله ﷺ، ركعتين قبل الظهر وركعتين بعدها، وركعتين بعد الجمعة، وركعتين بعد المغرب، وركعتين بعد العشاء" ((متفق عليه)).

'Abdullah bin Mughaffal (May Allah be pleased with him) reported:
The Messenger of Allah ﷺ said, "There is a Salat (prayer) between every Adhan and Iqamah; there is a Salat between every Adhan and Iqamah." (While saying the same for the) third time (he ﷺ added), "It is for him who desires (to perform it)."

[Al-Bukhari and Muslim].

وعن عبد الله بن مغفل، رضي الله عنه، قال: قال رسول الله ﷺ: "بين كل أذانين صلاة، بين كل أذانين صلاة، بين كل أذانين صلاة" وقال في الثالثة: "لمن شاء" ((متفق عليه)).