burying the deceased

the least is for there to be a hole in the ground such that when the deceased is buried,
(1) it conceals the smell of the deceased body
(2) it protects the body of the deceased from wild animals like scorpion, snakes etc.
Notes:
There must be a hole. If it is difficult to dig due to the condition of the ground(hard stony ground) whatsoever, then only placing soil above the body suffice.

for completeness, is to
(1) dig a hole that is as high as 1 body length with the arm stretched out ( approx 2 meters)
- does not matter the size of the kid
(2) the right cheek to cheek to touch the ground

it is wajib (compulsory) to ensure that the deceased is facing the qiblah
(1) if the deceased is placed lying straight up (face facing upwards to the sky), then the feet should be in the direction of ka'bah
(2) if the deceased is placed lying sidewards, then the face should be facing the ka'bah

Notes:
- the dimension of the width and the length of the hole depends on the size of the body
- Question: can the height of the grave be high above ground? Yes, for prominent people such as a wali, a scholar etc. This is so that it is easier for ziarah and to to note that that grave is not reusable. This is allowed by the earlier scholars because of a daleel of sahabas who were challenging to jump higher than the height of a particular grave of someone at that period.