'Burnt offering' in the Bible

then it shall be that whatever comes out from the doors of my house to meet me when I return in peace from the sons of Ammon, surely it shall belong to Jehovah, or I will offer it up instead of a burnt offering.

And the Angel of Jehovah said to Manoah, Though you keep Me, I will not eat of your bread. And if you will offer a burnt offering, you must offer it to Jehovah. For Manoah did not know that He was the Angel of Jehovah.

But his wife said to him, If Jehovah were pleased to kill us, He would not have received a burnt offering and a food offering at our hands, neither would He have showed us all these things, nor have told us such things as these at this time.