Appointment of Chief Justice of Nigeria and Justices of the Supreme Court
Section 231(2) · 1999 Constitution (2004 edition)
What Constitution says
(2) The appointment of a person to the office of a Justice of the Supreme Court shall be made by the President on the National Judicial Council subject to confirmation of such appointment by the senate.
This is the 1999 Constitution as published in 2004. Later amendments aren't included yet, so a section may have changed since.
Original source
Official Gazette · CFRN 1999 official PDF · printed page 101. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections