It is narrated from Hassan ibn Jahm who said:

I told Imam Ridha/Reza (AS): Do not forget me in your prayers. Imam (AS) replied: You suppose I forget you? I thought and said to myself: He prays for his Shias and I am one of them. Then I replied: No, you do not forget me. Imam Reza (AS) asked: How do you know? I replied: I am one of your Shias and you pray for them. Imam (AS) then said: Have you found out about anything else? I replied: No. Imam (AS) said: Whenever you wanted to know what your position is with me, see what my position is with you [1].

[1] Osul Kafi, Vol. 4,Page 270.

Source: en.shafaqna.com