John 11:2
(It was that Mary which anointed the Lord with ointment, and wiped his feet with her hair, whose brother Lazarus was sick.)
Cross-reference
John 12:3
Citation
John 12:3 describes the very anointing event referenced here, showing Mary's act of devotion.
Matthew 26:7
Parallel
Matthew 26:7 describes a woman pouring perfume on Jesus' head, corresponding to the anointing by Mary referenced here.
Mark 14:3
Parallel
Mark 14:3 recounts the same anointing at Bethany, with a woman pouring perfume on Jesus' head.