Sprinkle, namely, with blood to atone for guilt, as the high priest did (Lev_4:6; Lev_16:14; Lev_16:19), or with water for purifying (Num_19:18-21; Act_2:33). So Messiah (Isa_52:15; Heb_9:13-14; 1Pe_1:2). Many were astonished at Him; so shall He sprinkle many nations, even kings shall shut their mouths in dumb awe (compare Rom_16:25-26, and Rom_15:21 with Isa_52:14-15).
Fausset's Bible Dictionary
By Andrew Robert Fausset, co-Author of Jamieson, Fausset and Brown's 1888.
Isa_32:15 (a) In the days of the tabernacle Moses sprinkled the blood on everything in the tabernacle, and this was a sign to all others that GOD owned these things and had appointed these things for His own purpose and plan. So in the death of CHRIST He is telling us figuratively that in every nation, and among all peoples He will sprinkle the Blood of His Son on hearts and lives to make them His own children, and to save them by His grace.
Eze_36:25 (a) Probably the clean water represents the precious, pure Word of GOD. These pure messages from GOD will be brought to all the peoples of the world in some way or other, and some will believe and be saved. All will be responsible for the way they treat it.
Heb_10:22 (b) The teaching in this passage probably is that the Spirit of GOD works through His Word on the heart and the mind of the believer to remove from him the sense of guilt, because the precious Blood of CHRIST has been shed to put away his sins.
Wilson's Dictionary of Bible Types
press 1957.