John Owen An Exposition of the Epistle to the Hebrews

Lowry refers to the "manifold security" in his novel Ultramarine;  "it seemed to Hilliot now that Oedipus Tyrannus had a manifold security:" (Pg. 43). The phrase is used alongside other biblical allusions. One possible source is John Owen's An Exposition of the Epistle to the Hebrews first published in the 17th century; "The Lord Jesus being thus entered into heaven as our forerunner, gives us manifold security for entering in thither also at the appointed season."