'Sign' in the Bible

And this shall be a sign unto thee, that shall come upon thy two sons, on Hophni and Phinehas; in one day they shall die both of them.

So they went through the hill-country of Ephraim and through the land of Shalishah, but they saw no sign of them: then they went through the land of Shaalim, but they were not there: and they went through the land of the Benjamites, but they did not come across them.

Then Samuel took a small container of olive oil and poured it on Saul's head. Samuel kissed him and said, "The Lord has chosen you to lead his people Israel! You will rule over the Lord's people and you will deliver them from the power of the enemies who surround them. This will be your sign that the Lord has chosen you as leader over his inheritance.

And Saul's father's brother said to him and his servant, Where have you been? And he said, Searching for the asses: and when we saw no sign of them, we came to Samuel.

But if they say thus, Come up unto us; then we will go up: for the LORD hath delivered them into our hand: and this shall be a sign unto us.

And take these ten cheeses to the captain of their thousand, and see how your brothers are and come back with a sign to say how they are.