In Acts 18:18, Paul himself took a vow—demonstrating his own adherence to Jewish customs, which the vow here mirrors.

Numbers 6:2-7 provides the Nazirite vow regulations that Paul is asked to undertake, including abstaining from wine and not cutting hair.

Numbers 6:9 details the purification needed if a Nazirite is defiled by a sudden death, relevant to the vow's purity requirements.