Numbers 30:2 establishes the OT law that vows must be kept—the very principle Pharisees were distorting by their oath distinctions.

Mark 7:11 shows the Corban practice where a 'gift to God' overrides parental care—mirroring Pharisees' exalting the gift over the altar.

2 Chronicles 6:22 describes taking an oath before the altar—the practice Jesus criticizes when Pharisees make distinctions about swearing by altar vs gift.