Sefer HaBahir 50

1[Mar Rachumai continued,] it was taught, ' It is the glory of Elohim to conceal a word' (Proverbs 25:2). What is 'a word'? As it is said, 'Truth is the essence of Your word' (Psalms 119:160) [and] 'The glory of kings is to examine a word' (Proverbs 25:2). What is 'a word'? As is written, 'A word spoken in its proper form [אופניו]' (Proverbs 25:11). Do not read 'proper form' [אופניו], rather, 'His faces' [אפניו]."