'Stones' in the Bible

and always, night and day, in the mountains, and in the tombs he was, crying and cutting himself with stones.

And again he sent unto them another servant, and at that one having cast stones, they wounded him in the head, and sent away -- dishonoured.

And as he is going forth out of the temple, one of his disciples saith to him, 'Teacher, see! what stones! and what buildings!'