'Reason' in the Bible

And those men said to him, We are unclean by reason of the dead body of a man: why are we kept back, that we may not present the offering of Jehovah at its set time among the children of Israel?

Speak unto the children of Israel, saying, If any one of you or of your generations be unclean by reason of a dead body or be on a journey afar off, yet he shall hold the passover to Jehovah.

And ye shall bear no sin by reason of it, if ye heave from it the best of it; and ye shall not profane the holy things of the children of Israel, lest ye die.