The judge, Al-Moaafi bin Zakariyya, narrated from Abdullah bin Mohammad bin Abdillah bin Al-Aziz Al-Baghawi, from Yahya Al-Hamani, from Mohammad bin Al Faz’eel, from Al-Kalbi, from Abi Saleh, from Ibn Abbas, who said:
One day I was sitting in front of the Prophet, ALI (ASWS) , FATEMA (SAWS), HASAN (ASWS) and HUSAIN (ASWS) when Angel Jibraeel came down and greeted the PROPHET (SAWW) with an apple. The PROPHET (SAWW) accepted the greeting by taking the apple.
The Prophet then greeted ALI (ASWS) and gave him the apple. ALI BIN ABI TALEB (ASWS) accepted the greeting by taking the apple. He kissed the apple and then returned it to the MESSENGER of ALLAH (SWT). The PROPHET (SAWW) accepted his greeting by taking the apple.
Then the PROPHET (SAWW) greeted HASAN (ASWS) and gave him the apple. HASAN (ASWS) accepted the greeting by taking the apple. He kissed the apple and then returned it to the MESSENGER of ALLAH (SWT). The PROPHET (SAWW) accepted his greeting.
Then the PROPHET (SAWW) greeted HUSAIN (ASWS) and gave him the apple. HUSAIN (ASWS) accepted the greeting by taking the apple. He kissed the apple and then returned it to the MESSENGER of ALLAH (SWT). The PROPHET (SAWW) accepted his greeting.
Then the PROPHET (SAWW) greeted FATEMA (SAWS) and gave her the apple. FATEMA (SAWS) accepted the greeting by taking the apple. She kissed the apple and then returned it to the MESSENGER of ALLAH (SWT). The PROPHET (SAWW) accepted her greeting.
The PROPHET (SAWW) greeted ALI (ASWS) again and gave him the apple. ALI (ASWS) accepted his greeting and kissed the apple. In an effort to return the apple to the Prophet, the apple fell from his finger tips. The apple split into two halves and from it, a light shone until it reached the sky.
The following message was written inside the apple:
In the name of ALLAH (SWT), Most Gracious, Most Merciful. This is a greeting from ALLAH (SWT) to the chosen MOHAMMAD (SAWW) and to ALI AL- MURTADHA (ASWS) , and FATEMA Al-ZAHRAA (SAWS)', and HASAN (ASWS) and HUSAIN (ASWS) , the grandsons of the PROPHET (SAWW) . This letter is a guarantee to their lovers of protection from the fire on the Day of Judgement.
(Ref: Bihar V43 Pg 308 Hadees No. 72)