Which preposition to use with unwavering

in Occurrences 3%

" SECTION XXIV Vaisampayana said, "After they had departed, Yudhishthira the virtuous son of Kunti, unwavering in his promises, addressed all his brothers, saying, 'We shall have to dwell in the solitary forest for these twelve years.

as Occurrences 1%

"I believe that our readers will be glad to have this statement of our action, and this assurance that we feel as certain of winning the battle of a Free Press as when we began it a year ago, and that our determination is as unwavering as when Serjeant Outram arrested us in the spring of last year.

Which preposition to use with  unwavering