Leviticus 6:20

“This is the offering that Aaron and his sons must present to the Lord on the day he is anointed: a tenth of an ephah of fine flour as a regular grain offering, half of it in the morning and half in the evening.

Note A tenth of an ephah is approximately 2 dry quarts or 2.2 liters (probably about 2.6 pounds or 1.2 kilograms of flour).

BSB · Berean Standard Bible
This is the offering of Aaron and of his sons, which they shall offer unto the Lord in the day when he is anointed; the tenth part of an ephah of fine flour for a meat offering perpetual, half of it in the morning, and half thereof at night.
KJV · King James Version
“This is the offering of Aaron and of his sons, which they shall offer to the Lord in the day when he is anointed: one tenth of an ephah of fine flour for a meal offering perpetually, half of it in the morning, and half of it in the evening.

Note 1 ephah is about 22 liters or about 2/3 of a bushel

WEB · World English Bible
This is the oblation of Aaron and of his sons, which they shall offer unto Jehovah in the day when he is anointed: the tenth part of an ephah of fine flour for a meal-offering perpetually, half of it in the morning, and half thereof in the evening.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

the offering
This oblation, which the Jews call a {mincha} of initiation, seems to have been required of the high priest alone "on the day in which he was anointed," and from that time, every morning and evening, as long as he continued in office, and then in like manner of his successor; for, by "the sons of Aaron," may be understood his descendants and successors in the high priesthood, in their generations.
Exodus 29:2; Numbers 18:26–32; Hebrews 5:1; Hebrews 7:27; Hebrews 8:3, 4
in the day
The word {beyom} signifies not only in the day, but from that day forward; for it was a daily oblation, and for them and their successors, a statue for ever.
Leviticus 6:22
the tenth
Leviticus 5:1; Exodus 16:36
a meat offering
Leviticus 2:1–16; Exodus 29:35–42; Numbers 28:3, 10