Judith 2:12

12 For as I live, and by the power of my kingdom, whatsoever I have spoken, that will I do by mine hand.

Judith 2:12 In-Context

10 Thou therefore shalt go forth. and take beforehand for me all their coasts: and if they will yield themselves unto thee, thou shalt reserve them for me till the day of their punishment.
11 But concerning them that rebel, let not thine eye spare them; but put them to the slaughter, and spoil them wheresoever thou goest.
12 For as I live, and by the power of my kingdom, whatsoever I have spoken, that will I do by mine hand.
13 And take thou heed that thou transgress none of the commandments of thy lord, but accomplish them fully, as I have commanded thee, and defer not to do them.
14 Then Holofernes went forth from the presence of his lord, and called ail the governors and captains, and the officers of the army of Assur;
The King James Version is in the public domain.