New Defender's Study Bible Notes
27:53 after his resurrection. The Old Testament saints could only receive their glorified resurrection bodies after Christ had been raised, for Christ must “become the firstfruits of them that slept” (I Corinthians 15:20). Although this is apparently the only specific reference to the resurrection of these pre-Christian-era believers, no other interpretation seems plausible. Evidently their new bodies were seen by people on the earth during the brief period between Christ’s resurrection and His initial ascent to heaven (John 20:17).