It never says who he saw burning and it is safe to assume he never had any relation to that person. This is opinionated and not and answer from elie wiesel. however it is very likely.
When Elie and his father are marched into Auschwitz he learns of the crematoriums and what their fate is to be. He sees a large burning pit. Within the pit are burning bodies. He sees people throwing babies and small children into the fire.
Elie witnessed babies and children being thrown into the flaming pit at the concentration camp. This horrific sight left a lasting impact on him and served as a stark reminder of the cruelty of the Holocaust.
Shortly after arriving at Birkenau Elie Wiesel saw "babies" burning in a pit. It is not made clear whether or not these babies were dead or alive, or were young children rather than actual infants. This is what "murders his God".
Elie sees a reflection of himself in the mirror.
Elie sees a reflection of himself when he looks in the mirror.
Leaving a fire pit burning overnight is not safe and can pose a serious fire hazard. It is recommended to fully extinguish the fire before leaving it unattended.
Elie sees himself staring back at him, never leaving his memory.
First is the acid pit, then is the fire blood area, next is the burning spot, and finally there is the black pit where it all disappears.
At Birkenau, Elie Wiesel smells burning in the air, which is the scent of bodies being incinerated in the crematoriums. This horrific realization underscores the brutality of the Holocaust and the mass extermination taking place. The smell serves as a haunting reminder of the loss of life and the grim reality faced by the prisoners. It marks a turning point in Elie's experience, as he confronts the terrifying truth of their situation.
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Elie Wiesel's difficulties was to see not only his family vanish, but to see 6 million other people that look like him vanish, and to see such brutality and cruelty in the Nazi party towards the Jews.
Elie sees himself in the mirror at the end of the book as dead corpse gazing back at him.