Gather my saints together unto me. By "my saints" the psalmist means here, not godly Israel, as in Psalms 16:3, but all Israel—the whole nation, whether true servants of Jehovah, or only professed servants.
This is rendered clear by the ensuing clause, Those that have made a covenant with me by sacrifice. Not even was the first covenant dedicated without blood (Hebrews 9:18; comp. Exodus 24:3-8); nor could any Israelite remain within the covenant without frequent sacrifice (Exodus 12:2-47, etc.
).