The answer is: Meat and grain

Lev 7:30, 23:17 - The wave offering was part of the peace offerings given to God.

The wave offering was quite a fascinating ritual! Picture this: the ancient Israelites making a significant gesture of gratitude and recognition towards the Divine. It's not just about sacrificing for the sake of it—there’s a deep meaning. Specifically, the offering often consisted of a combination of meat and grain, illustrating the coexistence of sustenance and joy in worship.

The act itself involved the priest literally waving the offering in the presence of God, symbolically intertwining the earthly with the heavenly. In a way, it served as a bridge between the people and the Divine, and the community's commitment to God. This is echoed later in the practices of other ancient cultures; waving offerings could also signify an invitation for others, usually humans, to come into a celebrated communion with the divine.

An interesting note on wave offerings is their link to later biblical narratives. When we consider Christ's miracles—like the loaves and fishes—could this gesture of sharing food also mirror the heart of what was expressed in wave offerings? Interestingly, peace offerings, which included the wave offering, provided a communal feast where people could sit and enjoy a meal together, uniting families and tribes in fellowship.

And let's not miss that they're offering food! In a nomadic culture, sharing bread is an act of life, communion, and sustenance—and we continue this tradition today in various forms. This ancient ritual invites us to explore the balance of giving, receiving, and the joy of community-building in spiritual practice.