If any one of you improve (follows strictly) his Islamic religion then his good deeds will be rewarded ten times to seven hundred times for each good deed and a bad deed will be recorded as it is.

Bukhari - Volume 1, Book 2, Number 40

He who commits suicide by throttling shall keep on throttling himself in the hell fire (forever) and he who commits suicide by stabbing himself shall keep on stabbing himself in the hell fire.

Sahih Al-Bukhari Vol. 2 : No. 446

Ibn Abbas (may Allah swt please with him) narrated:
Allah's Messenger (peace and blessings of Allah swt be upon him) once passed by two graves, and those two persons (in the graves) were being tortured. He said, "They are being tortured not for a great thing (to avoid). One of them never saved himself from being soiled with his urine, while the other was going about with calumnies (to make enmity between friends)." He then took a green leaf of a date-palm tree split it into two pieces and fixed one on each grave. The people said, "O Allah's Apostle! Why have you done so?". He replied, "I hope that their punishment may be lessened till they (the leaf) become dry."

Sahih Al-Bukhari Vol. 2 : No. 443

Abu Huraira (may Allah swt please with him) narrated:
Allah's Messenger (peace and blessings of Allah swt be upon him) said, "Every child is born with a true faith of Islam (i.e. to worship none but Allah Alone) but his parents convert him to Judaism, Christianity or Magainism, as an animal delivers a perfect baby animal. Do you find it mutilated?"
Then Abu Huraira recited the holy verses: "The pure Allah's Islamic nature (true faith of Islam) (i.e. worshipping none but Allah) with which He has created human beings. No change let there be in the religion of Allah (i.e. joining none in worship with Allah). That is the straight religion (Islam) but most of men know, not." (30.30)

Sahih Al-Bukhari Vol. 2 : No. 441

The deceased is tortured in his grave for the wailing done over him.

Sahih Al-Bukhari Vol. 2 : No. 379

If any one of you see a funeral procession and he is not going along with it, then he should stand and remain standing till he gets behind it, or it leaves him behind, or the coffin is put down before it goes ahead of him.

Sahih Al-Bukhari Vol. 2 : No. 395

The real patience is at the first stroke of a calamity.

Sahih Al-Bukhari Vol. 2 : No. 389

When the funeral is ready and the men carry it on their shoulders, if the deceased was righteous it will say, 'Present me (hurriedly),' and if he was not righteous, it will say, 'Woe to it (me)! Where are they taking it (me)?'. Its voice is heard by everything except man and if he heard it he would fall unconscious.

Sahih Al-Bukhari Vol. 2 : No. 400

"Whoever attends the funeral procession till he offers the funeral prayer for it, will get a reward equal to one Qirat, and whoever accompanies it till burial, will get a reward equal to two Qirats".

It was asked, "What are two Qirats?"

The Prophet (peace and blessings of Allah swt be upon him) replied, "Like two huge mountains."

Sahih Al-Bukhari Vol. 2 : No. 410

Hadrat Anas ibn Malik (may Allah swt be pleased with him) reported: "We returned with the Messenger of Allah (peace and blessings of Allah swt be upon him) from a journey and when we entered the suburbs of Al-Madinah, the Prophet (peace and blessings of Allah swt be upon him) said:
'Ayibuna, ta'ibuna, aabiduna, li-Rabbina hamidun'
(We are returning in safety, turning to our Lord, worshipping Him and praising Him).

He (peace and blessings of Allah swt be upon him) continued repeating these words till we entered Al-Madinah".

Muslim. Riyad-us-Saliheen (Hadith # 987)

[Message for us in hadith: When one returns from a journey and sees one’s town suburbs, he should start reciting the invocation mentioned in this hadith till he enters the city. These phrases express gratitude to Allah Subhanah wa Ta'ala for the safe return to one's hometown; they also express repentance, obedience and determination to worship Allah.]