'Grain Offering' in the Bible

"'When anyone offers a grain offering to the LORD, his offering shall be of fine flour; and he shall pour oil on it, and put frankincense on it.

So Manoah took the young goat and a grain offering, and offered it on the rock to the LORD, who works wonders. Then the angel did a wonderful thing as Manoah and his wife looked on.

But his wife said to him, "If the LORD meant to kill us, he wouldn't have received a burnt offering and a grain offering from us, neither would he have shown us all these things, nor would he have spoken to us now like this."