The witness shall prove attendance, in open court, by oath before the clerk that the witness has not, directly or indirectly, personally procured summons as a witness, that the witness was legally summoned on behalf of the state and has verily attended the court, as a witness, the number of days claimed.
Code 1858, § 5394; Shan., § 7369; Code 1932, § 11975; T.C.A. (orig. ed.), § 40-2424.