Matthew Poole and continuators on 1 Peter 1:19

19 But with the precious blood of Christ, as of a Lamb without blemish , and without spot .

Because the Blood not only of an innocent Person, but of the Son of God, Acts 20.28.

i. e. VVho was a Lamb.

The Lamb of God that takes away the Sins of the World, Joh. 1.29. not only like a Lamb for his Innocence and Gentleness, Isa. 53.7. but the Antitype of the Lambs, which under the Law were offered in the daily Sacrifices, and more especially of the Paschal Lamb; whatever was shadowed out in that, and those other Sacrifices having its Accomplishment in Christ.

VVithout Fault, without Defect, in which nothing was wanting, that was requisite to its Perfection; or, in which nothing could be blamed. The Greek word seems to be derived from the Hebrew Mum, so often used for a Blemish; see Lev. 24.19, 20.

VVithout any other Deformity. The Lamb might have no Defect, but yet might have some Spot; and it was to be perfect, (Exod. 12.5.) which implied its having nor the one, nor the other. Christ was such a Lamb, perfect in Holiness, and free from all Sin, Iohn 8.29, 46. and Heb. 7.26. 1 Pet. 2.22.

Marginal references: Heb. 9.12▪ 14. Rev. 5.9.; 1 Cor. 5.7.