Numbers 35:22

But and if he pushed him by chance and not of hate, or cast at him with any manner of thing and not of laying of wait,

Exodus 21:13

If a man lay not await, but God deliver him into his hand; then I will point thee a place whither he shall flee.

Numbers 35:11

ye shall build cities which shall be privileged towns for you: that he which slayeth a man unawares, may fly thither.

Deuteronomy 19:5

as when a man goeth unto the wood with his neighbour to hew wood, and as his hand fetcheth a stroke with the axe, the head slippeth from the helve and smiteth his neighbour that he die; the same shall flee unto one of the same cities and be saved.

Joshua 20:3

that the slayer that killeth any person unawares and unwittingly, may flee thither. And those cities shall be your refuge from the avenger of blood.

Joshua 20:5

And when the avenger of blood followeth after him they shall not deliver the slayer unto his hand: because he smote his friend ignorantly, and hated him not before time.

Treasury of Scripture Knowledge

Summary

But if he thrust him suddenly without enmity, or have cast upon him any thing without laying of wait,

Bible References

General references

Numbers 35:11
ye shall build cities which shall be privileged towns for you: that he which slayeth a man unawares, may fly thither.
Exodus 21:13
If a man lay not await, but God deliver him into his hand; then I will point thee a place whither he shall flee.
Deuteronomy 19:5
as when a man goeth unto the wood with his neighbour to hew wood, and as his hand fetcheth a stroke with the axe, the head slippeth from the helve and smiteth his neighbour that he die; the same shall flee unto one of the same cities and be saved.
Joshua 20:3
that the slayer that killeth any person unawares and unwittingly, may flee thither. And those cities shall be your refuge from the avenger of blood.