(6) I will wash. — First a symbolical action (Deuteronomy 21:6 seq.; Matthew 27:24), then a figure of speech (Job 9:30; Ezekiel 36:25). The Levitical authorship or, at all events, the Levitical character of the psalm appears from comparison of this with Exodus 30:17 seq.
So will I. — Better, that I may, &c. There is no other reference in Jewish literature to the custom of pacing round the altar, but it was a very natural and obvious addition to a gorgeous ceremonial — like the processions in churches where a high ceremonial is adopted. It is, however, implied from the Talmud that it was part of the ceremonial of the Feast of Tabernacles for people to march round the altar with palms.