'Fro' in the Bible

“Surely every man walks around like a shadow [in a charade];Surely they make an uproar for nothing;Each one builds up riches, not knowing who will receive them.

Do not kill them, or my people will forget;Scatter them and make them wander [endlessly] back and forth by Your power, and bring them down,O Lord our shield!

They know not, neither do they understand; They walk to and fro in darkness: All the foundations of the earth are shaken.

They reel to and fro, and stagger like a drunken man, and are at their wits' end.

He who goes to and fro weeping, carrying his bag of seed,Shall indeed come again with a shout of joy, bringing his sheaves with him.