Numbers 9:12

9:12 They must not leave any of it until morning, nor break any of its bones; they must observe it in accordance with every statute of the Passover.

John 19:33

19:33 But when they came to Jesus and saw that he was already dead, they did not break his legs.

John 19:36

19:36 For these things happened so that the scripture would be fulfilled, “Not a bone of his will be broken.” ¹ 

¹ sn A quotation from Exod 12:46, Num 9:12, and Ps 34:20. A number of different OT passages lie behind this quotation: Exod 12:10 LXX, Exod 12:46, Num 9:12, or Ps 34:20. Of these, the first is the closest in form to the quotation here. The first three are all more likely candidates than the last, since the first three all deal with descriptions of the Passover lamb.