I'm looking for someone who can help me verify the spelling of a Gaelic saying that I'd like to get a tattoo of. The saying I'm looking for is "There's not a wise man without fault", and I've seen a couple different spellings for it so I was hoping someone could verify one for me.

Níl saoi gan locht.

Ní bhíonn saoi gan locht.

Thanks.

The first of the above translates to English as "A wise person is not without fault." It makes the same idiomatic sense as the latter, however, the latter is the idiom as far as I'm aware. It translates as "There is not a wise person without fault".

Ní bhíonn saoi gan locht appears in the Collins Irish dictionary app as an example for the word saoi.

Both are correct.
There's only a minor difference in tense (simple present vs. habitual present)

Níl saoi gan locht = There’s not a wise man without fault (at this moment)
Ní bhíonn saoi gan locht = There’s not a wise man without fault (… and won’t be anytime)