Tractate Derekh Eretz Zuta
R. Joshua said: Great is peace, for it is given [as a blessing] to the living and the dead. Whence to the living? [As it is stated,] And Jethro said to Moses: ‘Go in peace’.51Ex. 4, 18. And whence to the dead? [As it is stated,] But thou shalt go to thy fathers in peace.52Gen. 15, 15.