Verses with the word happened in the Old Testament (5 verses):

1 Samuel 6:9
And see, if it goeth up by the way of his own coast to Bethshemesh, then he hath done us this great evil: but if not, then we shall know that it is not his hand that smote us: it was a chance that happened to us.

2 Samuel 1:6
And the young man that told him said, As I happened by chance upon mount Gilboa, behold, Saul leaned upon his spear; and, lo, the chariots and horsemen followed hard after him.

2 Samuel 20:1
And there happened to be there a man of Belial, whose name was Sheba, the son of Bichri, a Benjamite: and he blew a trumpet, and said, We have no part in David, neither have we inheritance in the son of Jesse: every man to his tents, O Israel.

Esther 4:7
And Mordecai told him of all that had happened unto him, and of the sum of the money that Haman had promised to pay to the king's treasuries for the Jews, to destroy them.

Jeremiah 44:23
Because ye have burned incense, and because ye have sinned against the LORD, and have not obeyed the voice of the LORD, nor walked in his law, nor in his statutes, nor in his testimonies; therefore this evil is happened unto you, as at this day.