King James Version
Speak unto the children of Israel, and say unto them, When either man or woman shall separate themselves to vow a vow of a Nazarite, to separate themselves unto the LORD:English Standard Version
"Speak to the people of Israel and say to them, When either a man or a woman makes a special vow, the vow of a Nazirite, to separate himself to the LORD,New International Version
"Speak to the Israelites and say to them: 'If a man or woman wants to make a special vow, a vow of separation to the LORD as a Nazirite,