'On Earth' in the Bible

If, indeed, therefore, he had been on earth, he had not, in that case, even been a priest, since there are those who are offering the gifts, according to the law: -

Beware, lest ye excuse yourselves from him that speaketh; for, if, they escaped not, who excused themselves from him who on earth was warning, how much less, shall, we, who from him that warneth from the heavens, do turn ourselves away: