According to rahyafte (the missionaries and converts website) Habba ‘Arani said, “Imam Ali (a) and I went out of Kufa at noon. He (a) stopped in Wadi al-Salam and it was as if he (a) was speaking with some people. I stood with him until I became tired and sat as long as I became tired and stood again until I became tired like the first time and sat so long I became tired and stood up again and wrapped up my cloak and told Imam (a), “O Amir al-Mu’minin (a)! I pitied you for so long standing! You may take a rest for an hour.” Then, I spread my cloak on the ground for him to sit on it. He (a) said, “O Habba, it was not just a stop and standing, but speaking with a believer and communicating with him.”
I said, “O Amir al-Mu’minin (a)! Do dead ones make any communication?”
He (a) said, “If the curtains are removed from your eyes, you will see them sitting and speaking in circles.”
I asked, “are they objects or souls.”
He (a) said, “they are souls and no believer dies in any land except his soul is told to move to Wadi al-Salam, which is a hall from the Garden of Eden.”
(1) Furu’ Kafi, vol. 1, p. 66.
(2) Sisad-o bist dastan as mo’jezat va keramat-e Imam Ali (a), Abbas Azizi.