Imam Sadiq (peace be upon him) says:
My father used to quote from his father that Hassan Ibn Ali Ibn Abi Taleb was the most venerable worshipers and the most God-fearing person of his time. When he used to go to Hajj, he was used to walking there with bare-foot.
When he remembered death, grave and resurrecting on the day of resurrection and also passing from Sirat Bridge, he used to weep and when he recalled answering before Allah, he used to shriek and fainted and when he stood to say his prayers, his body trembled before Allah and when he remembered heaven and hell he used to agonize as if he is bitten by a snake, and he always begged Allah for paradise and took refuge to Allah from Hell.
source : erfan.ir
