Amos throws a surprising question at Israel: 'Did you really offer sacrifices to me in the wilderness?' It sounds like he's denying they did, but is that the whole story?
Amos isn't necessarily saying Israel offered no sacrifices in the wilderness. The records show they did offer sacrifices, especially after the covenant at Sinai and the dedication of the Tabernacle (Exodus 24, Numbers 7).
However, Amos's question is sharp and carries a powerful implication: were those sacrifices truly offered to God? The commentaries highlight that Israel's hearts were often divided. They were prone to idolatry, even during that formative period. So, while the physical acts of sacrifice might have occurred, the intention and the object of their worship were often corrupted.
Think of it like this: You can go through the motions of a prayer, but if your mind is elsewhere, or if you're secretly holding onto something God has called you to let go of, is it truly a prayer offered to Him?
Amos implies that the wilderness worship was often a mixed bag, directed partly to God and partly to idols ('sacrificed to devils, not to God,' Deuteronomy 32:17). God desires wholehearted devotion, not a divided offering.