2:22 So after he was raised from the dead, his disciples remembered that he had said this, and they believed the scripture 1 and the saying 2 that Jesus had spoken.
1 snThey believed the scripture is probably an anaphoric reference to Ps 69:9 (69:10 LXX), quoted in John 2:17 above. Presumably the disciples did not remember Ps 69:9 on the spot, but it was a later insight.