Supplication for the deceased at the grave or in the mosque

Question:
He says: Honorable Shaykh, may Allah grant you success, which is better: supplicating for the deceased at the grave or in the mosque?

Answer:
Both are done. One supplicates for him during the funeral prayer, while the prayer is being performed. One supplicates for him after the burial. One supplicates for him when visiting him, if one visits. One supplicates for him when passing by the graves. Supplication is required for the Muslim, both in groups and as individuals. And the more supplication there is for them, the better it is for them. Yes.