We see at John 19: 31-36, how the early death of Jesus on the Cross staved off the prospects of his legs being broken to fasten death :
".... Because the Jewish leaders did not want the bodies left on the crosses during the Sabbath, they asked Pilate to have the legs broken and the bodies taken down. .... But when they came to Jesus and found that he was already dead, they did not break his legs... These things happened so that the scripture would be fulfilled: “Not one of his bones will be broken,”
The cross reference of OT that one gets to the said Verse 36 are the following:
The righteous person may have many troubles, but the Lord delivers him from them all; he protects all his bones, not one of them will be broken.
"The Lord said to Moses and Aaron, “These are the regulations for the Passover meal:... It must be eaten inside the house; take none of the meat outside the house. Do not break any of the bones. "
Numbers 9: 10-12:
"" Tell the Israelites: .... to celebrate the Lord’s Passover, ..... on the fourteenth day of the second month at twilight. They are to eat the lamb, together with unleavened bread and bitter herbs. They must not leave any of it till morning or break any of its bones. "
While the references of Exodus and Numbers refer to the bones of the sacrificial lamb, that of Psalms refer to the righteous person. I wish to know as to which of the above is the OT reference that the Evangelist had in mind at John 19:36 . Does the Catholic Church offer any definitive clue in this regard ?