Which preposition to use with untiring

in Occurrences 22%

Muriel was untiring in her activity.

as Occurrences 1%

Even now, untiring as my care for you shall ever be, I know my enemies will be as tireless in endeavours to rob me of you.

at Occurrences 1%

Hewn from hard rocks, untired at set of sun, Milo, didst ne'er regret some absent one? MILO.

in Occurrences 1%

Gaspard had heard that this young man was quickest afoot, readiest with his weapon, most untiring in the dance, and keenest for adventure of all the eight brothers in his noble family.

than Occurrences 1%

Yea, that which maketh Launcelot so singularly dear to all the world, is that he was not different from other men, but like other men, both in his virtues and his shortcomings; only that he was more strong and more brave and more untiring than those of us who are his brethren, both in our endeavors and in our failures.

Which preposition to use with  untiring