Luke 20:42

ἐν βίβλῳ ψ., in the book of Psalms, in place of ἐν τῷ πνεύματι τ. ἁγ. (in the Holy Spirit, Mk.), which one might have expected Lk. to retain if he found it in his source. But he probably names the place in O.T. whence the quotation is taken for the information of his readers. That what was written in the Psalms, was spoken by the Holy Spirit, was axiomatic for him. ὑποπόδιον, as in the Psalms, for ὑποκάτω in Mt. and Mk. according to the approved readings. Lk. seems to have turned the passage up (Holtzmann, H. C.).