'One tenth' in the Bible

the man shall then bring his wife to the priest, and shall bring as an offering for her one-tenth of an ephah of barley meal; he shall not pour oil on it nor put frankincense on it, for it is a grain offering of jealousy, a grain offering of memorial, a reminder of iniquity.

The one who presents his offering shall present to the Lord a grain offering of one-tenth of an ephah of fine flour mixed with one-fourth of a hin of oil,

and one-tenth for each of the seven lambs.