Read all Ahadith in the book of al-janaiz (funerals) by sahih al bukhari

Narrated Abu Dhar: Allah's Apostle said, Someone came to me from my Lord and gave me the news (or good tidings) that if any of my followers dies worshipping none (in any way) along with Allah, he will enter Paradise. I asked, Even if he committed illegal sexual intercourse (adultery) and theft? He replied, Even if he committed illegal sexual intercourse (adultery) and theft.

Narrated `Abdullah: Allah's Apostle said, Anyone who dies worshipping others along with Allah will definitely enter the Fire. I said, Anyone who dies worshipping none along with Allah will definitely enter Paradise.

Narrated Al-Bara' bin `Azib: Allah's Apostle ordered us to do seven things and forbade us to do other seven. He ordered us: to follow the funeral procession. to visit the sick, to accept invitations, to help the oppressed, to fulfill the oaths, to return the greeting and to reply to the sneezer: (saying, May Allah be merciful on you, provided the sneezer says, All the praises are for Allah, ). He forbade us to use silver utensils and dishes and to wear golden rings, silk (clothes), Dibaj (pure silk cloth), Qissi and Istabraq (two kinds of silk cloths).

Narrated Abu Huraira: I heard Allah's Apostle saying, The rights of a Muslim on the Muslims are to follow the funeral processions, to accept invitation and to reply the sneezer. (see Hadith No 331)

Narrated `Aisha: Abu Bakr came riding his horse from his dwelling place in As-Sunh. He got down from it, entered the Mosque and did not speak with anybody till he came to me and went direct to the Prophet, who was covered with a marked blanket. Abu Bakr uncovered his face. He knelt down and kissed him and then started weeping and said, My father and my mother be sacrificed for you, O Allah's Prophet! Allah will not combine two deaths on you. You have died the death which was written for you. Narrated Abu Salama from Ibn `Abbas : Abu Bakr came out and `Umar , was addressing the people, and Abu Bakr told him to sit down but `Umar refused. Abu Bakr again told him to sit down but `Umar again refused. Then Abu Bakr recited the Tashah-hud (i.e. none has the right to be worshipped but Allah and Muhammad is Allah's Apostle) and the people attended to Abu Bakr and left `Umar. Abu Bakr said, Amma ba'du, whoever amongst you worshipped Muhammad, then Muhammad is dead, but whoever worshipped Allah, Allah is alive and will never die. Allah said: 'Muhammad is no more than an Apostle and indeed (many) Apostles have passed away before him ..(up to the) grateful.' (3.144) (The narrator added, By Allah, it was as if the people never knew that Allah had revealed this verse before till Abu Bakr recited it and then whoever heard it, started reciting it. )

Narrated `Aisha: Abu Bakr came riding his horse from his dwelling place in As-Sunh. He got down from it, entered the Mosque and did not speak with anybody till he came to me and went direct to the Prophet, who was covered with a marked blanket. Abu Bakr uncovered his face. He knelt down and kissed him and then started weeping and said, My father and my mother be sacrificed for you, O Allah's Prophet! Allah will not combine two deaths on you. You have died the death which was written for you. Narrated Abu Salama from Ibn `Abbas : Abu Bakr came out and `Umar , was addressing the people, and Abu Bakr told him to sit down but `Umar refused. Abu Bakr again told him to sit down but `Umar again refused. Then Abu Bakr recited the Tashah-hud (i.e. none has the right to be worshipped but Allah and Muhammad is Allah's Apostle) and the people attended to Abu Bakr and left `Umar. Abu Bakr said, Amma ba'du, whoever amongst you worshipped Muhammad, then Muhammad is dead, but whoever worshipped Allah, Allah is alive and will never die. Allah said: 'Muhammad is no more than an Apostle and indeed (many) Apostles have passed away before him ..(up to the) grateful.' (3.144) (The narrator added, By Allah, it was as if the people never knew that Allah had revealed this verse before till Abu Bakr recited it and then whoever heard it, started reciting it. )

Narrated Kharija bin Zaid bin Thabit: Um Al-`Ala', an Ansari woman who gave the pledge of allegiance to the Prophet said to me, The emigrants were distributed amongst us by drawing lots and we got in our share `Uthman bin Maz'un. We made him stay with us in our house. Then he suffered from a disease which proved fatal when he died and was given a bath and was shrouded in his clothes, Allah's Apostle came I said, 'May Allah be merciful to you, O Abu As-Sa'ib! I testify that Allah has honored you'. The Prophet said, 'How do you know that Allah has honored him?' I replied, 'O Allah's Apostle! Let my father be sacrificed for you! On whom else shall Allah bestow His honor?' The Prophet said, 'No doubt, death came to him. By Allah, I too wish him good, but by Allah, I do not know what Allah will do with me though I am Allah's Apostle. ' By Allah, I never attested the piety of anyone after that.

Narrated Jabir bin `Abdullah: When my father was martyred, I lifted the sheet from his face and wept and the people forbade me to do so but the Prophet did not forbid me. Then my aunt Fatima began weeping and the Prophet said, It is all the same whether you weep or not. The angels were shading him continuously with their wings till you shifted him (from the field).

Narrated Abu Huraira: Allah's Apostle informed (the people) about the death of An-Najashi on the very day he died. He went towards the Musalla (praying place) and the people stood behind him in rows. He said four Takbirs (i.e. offered the Funeral prayer).

Narrated Anas bin Malik: The Prophet said, Zaid took over the flag and was martyred. Then it was taken by Jafar who was martyred as well. Then `Abdullah bin Rawaha took the flag but he too was martyred and at that time the eyes of Allah's Apostle were full of tears. Then Khalid bin Al-Walid took the flag without being nominated as a chief (before hand) and was blessed with victory.