Reference for Leviticus 27:2

דַּבֵּ֞ר אֶל־בְּנֵ֤י יִשְׂרָאֵל֙ וְאָמַרְתָּ֣ אֲלֵהֶ֔ם אִ֕ישׁ כִּ֥י יַפְלִ֖א נֶ֑דֶר בְּעֶרְכְּךָ֥ נְפָשֹׁ֖ת לַֽיהוָֽה׃

Speak unto the children of Israel, and say unto them: When a man shall clearly utter a vow of persons unto the LORD, according to thy valuation,