The sayings of Prophet Muhammad peace be upon him

[أبوسيف]

Hadrat Abu Hurairah (r.a.) reported: The Messenger of Allah (saws) said, "Whoever follows the funeral procession and offers the funeral prayer for it, will get a reward equal to one Qirat, and whoever attends it till burial, will get a reward equal to two Qirat.`` It was asked, "What are two Qirat?`` He (PBUH) replied, "Equal to two huge mountains

Related by Bukhari and Muslim

Commentary
The Messenger of Allah (saws) encouraged the believers to attend the burial of their believing brethren stating that one who follows the funeral and offers the prayer would get a reward as huge as a mountain….and if one follows the burial, offers the funeral prayer, and waits till the deceased is buried in the grave one would be entitled to earn a reward of two huge mountains

عن‏ ‏أبي هريرة ‏ ‏رضي الله عنه ‏ ‏قال: ‏
‏قال رسول الله ‏ ‏صلى الله عليه وسلم ‏ ‏من شهد الجنازة حتى يصلي فله ‏ ‏قيراط ‏ ‏ومن شهد حتى تدفن كان له قيراطان قيل وما القيراطان قال مثل الجبلين العظيمين ‏.

فتح الباري بشرح صحيح البخاري

[أبوسيف]

Umm Habibah (r.a.) the mother of the believers, reported:'I heard the Messenger of Allah (PBUH) saying, A house will be built in Jannah for every believer who offers twelve Rakah of optional prayer other than the obligatory prayer in a day and a night

Related by Muslim

Commentary
If one makes it a practice to offer (at least) twelve extra rakahs in addition to the five obligatory prayers, the Messenger of Allah (saws) gave them the glad tiding of a house which would be built for them in Paradise.
The twelve extra (or Nafl) rakahs which the Prophet (saws) never failed to offer, and which are known as Sunnah Muaqqedah are:
Two rakahs before the 'Fajr' prayer.
Four rakahs before the 'Dhuhr' prayer and two rakahs after it.
Two rakahs after the 'Magrib' prayer.
Two rakahs after the 'Isha' prayer.

عن أم حبيبة رضي الله عنها في سنن الترمذي ، قالت سمعت رسول الله صلى الله عليه و سلم يقول: "من صلى في يوم وليلة ثنتي عشرة ركعة بني له بيت في الجنة: أربعاً قبل الظهر، وركعتين بعدها، وركعتين بعد المغرب، وركعتين بعد العشاء، وركعتين قبل صلاة الفجر".