Strong H3979 מַאֲכֶ֫לֶת ma'ăkeleth · knife

Genesis

1. Genesis 22:6
   And Abraham took the wood of the burnt offering, and laid it upon Isaac his son; and he took the fire in his hand, and a knife; and they went both of them together.
2. Genesis 22:10
   And Abraham stretched forth his hand, and took the knife to slay his son.