Numbers 5:18 shows the offering placed in her hands; here the priest takes a handful from it. Sequential.

Leviticus 2:2 details taking a handful of grain offering as a memorial, the same action performed here.

Leviticus 2:9 describes burning the memorial of the grain offering, identical to this step.

Leviticus 5:12 also involves taking a handful of the offering as a memorial for sin offering, parallel.

Leviticus 6:15 repeats the ritual of taking a handful and burning as memorial, same as here.