Noah Webster's Dictionary (p. pr. & vb. n.) of Assert.

Multi-Version Concordance Asserting (2 Occurrences) Acts 24:9 The Jews also joined in the attack, affirming that these things were so. (See NAS NIV) Isaiah 9:9 And all the people will have experience of it, even Ephraim and the men of Samaria, who say in the pride of their uplifted hearts, (See NAS)