Assallamu alaikum wa rahmatullahi wa barakatu.
I had a dream of my father in law ,who passed away 3 months ago. He sat in a chair in our bedroom while we were sleeping, but we were also in the dream. He then came nearer to the bed and said he was feeling cold. And my husband got a little heater to give him heat. I sat on the floor and was speaking to him .
Is there a specific dua I can recite at his grave to make him feel warm and comfortable.
Jazak Allah khayran
Wa alaykum salam
It means recite Quran and gift him the rewards. Allah knows best.