'Certain' in the Bible

and one in a certain place did testify fully, saying, 'What is man, that Thou art mindful of him, or a son of man, that Thou dost look after him?

for certain having heard did provoke, but not all who did come out of Egypt through Moses;

for He spake in a certain place concerning the seventh day thus: 'And God did rest in the seventh day from all His works;'

since then, it remaineth for certain to enter into it, and those who did first hear good news entered not in because of unbelief --

again He doth limit a certain day, 'To-day,' (in David saying, after so long a time,) as it hath been said, 'To-day, if His voice ye may hear, ye may not harden your hearts,'

not forsaking the assembling of ourselves together, as a custom of certain is, but exhorting, and so much the more as ye see the day coming nigh.

but a certain fearful looking for of judgment, and fiery zeal, about to devour the opposers;

of the hospitality be not forgetful, for through this unawares certain did entertain messengers;