Job 28
World English Bible
21Seeing it is hidden from the eyes of all living, and kept close from the birds of the sky.
Reina-Valera 1909
21Porque encubierta está á los ojos de todo viviente, y á toda ave del cielo es oculta.
King James Version
21Seeing it is hid from the eyes of all living, and kept close from the fowls of the air.