The answer is: His hand

Lev 1:4 - Laying a hand on the head of the burnt offering symbolized the transfer of the offerer's sins to the sacrifice.

When the priest placed his hand on the head of a burnt offering, it was a deeply symbolic act that bridged the gap between the offerer and God. This was more than a mere ritual; it represented a heartfelt connection, a moment where personal transgressions were seen as being exchanged for the life of the animal. Imagine it - an ancient gathering where the rustle of a crowd mingled with the scent of incense, and the priest’s propped hand signaled not just guilt, but a profound plea for clemency.

This practice echoes prior biblical narratives as well, notably in the Day of Atonement ceremonies where the infamous scapegoat bore the weight of the community's sins into the wilderness. The imagery of laying hands speaks powerfully across scripture, reminding us of the connection between the physical and the spiritual, between the sin and its relinquishing onto another.

In this burnt offering ritual, the choice of animal also holds significance - often an unblemished lamb, evoking themes of innocence intertwined with sacrificial love, foreshadowing later scenes involving the Lamb of God. The symbolism permeates throughout sacred texts and continues to resonate today in themes of sacrifice, atonement, and the hope for redemption. It's fascinating to consider how such seemingly small acts can carve trajectories of meaning that spread endlessly through the story of faith and understanding of humanity's connection to the divine.