Many authentic Hadeeths stated that every persons will see during his death the Prophet (SAWA) and Ali (AS) and will get the good news of the happiness if he is sincere believer, or will see the bad result of his bad deeds if he was non believer. Al-Shaikh al-Sadouq narrated in his book al-Amaali أمالي الصدوق the statement from Ali: YA HAARA HAMDAN MAN YAMOT YARANI يا حار همدان ٬من يمت يرني O Harith of Hamdan, everyone who dies will see me.

Beside the fact that the sincere believer will see and get good news from Imam Ali (AS) on the moments of death, it is also confirmed that some very sincere and pious believers are been visited by the Infallible Imams in their grave to help them and remove hardships of grave from them. This is mentioned  for pious believers who are :

- Very nice to their parents and relatives.

 - Who recite Ziyarat Ashura every day.

- Who perform Night Prayer .

-Who sacrifice their wealth and comfort in the way if Allah.

- Who sacrifice their life in the love of Allah, the Prophet and Ahlul Bayt (AS).

- Who avoid sinful acts for sake of Allah.

and many other acts of pious and obedience of Allah.

Wassalam.