Augustine of Hippo
Catena Aurea · Johannesevangelium 19
The Jews therefore, because it was the preparation, that the bodies should not remain upon the cross on the sabbath day, (for that sabbath day was an high day,) besought Pilate that their legs might be broken, and that they might be taken away. Then came the soldiers, and brake the legs of the first, and of the other which was crucified with him. But when they came to Jesus, and saw that he was dead already, they brake not his legs: But one of the soldiers with a spear pierced his side, and forthwith came there out blood and water. And he that saw it bare record, and his record is true: and he knoweth that he saith true, that ye might believe. For these things were done, that the Scripture should be fulfilled, A bone of him shall not be broken. And again another Scripture saith, They shall look on him whom they pierced. Besought Pilate that their legs might be broken. And he knoweth that he saith true, that ye might believe.
(Tr. cxx) He that saw it knoweth; let him that saw not believe his testimony. He gives testimonies from the Scriptures to each of these two things he relates. After, they brake not His legs, He adds, For these things were done, that the Scripture should be fulfilled, A bone of Him shall not be broken, a commandment which applied to the sacrifice of the paschal lamb under the old law, which sacrifice foreshadowed our Lord’s. Also after, One of the soldiers with a spear opened His side, then follows another Scripture testimony; And again another Scripture saith, They shall look on Him whom they pierced, (Zech. 12:10) a prophecy which implies that Christ will come in the very flesh in which He was crucified.