Numbers 6:6

Ye shall not make any cuttings in your flesh for the dead, nor print any marks upon you: I am the LORD.

He that toucheth the dead body of any man shall be unclean seven days. He shall purify himself with it on the third day, and on the seventh day he shall be clean: but if he purify not himself the third day, then the seventh day he shall not be clean. Whosoever toucheth the dead body of any man that is dead, and purifieth not himself, defileth the tabernacle of the LORD; and that soul shall be cut off from Israel: because the water of separation was not sprinkled upon him, he shall be unclean; his uncleanness is yet upon him. This is the law, when a man dieth in a tent: all that come into the tent, and all that is in the tent, shall be unclean seven days. And every open vessel, which hath no covering bound upon it, is unclean. And whosoever toucheth one that is slain with a sword in the open fields, or a dead body, or a bone of a man, or a grave, shall be unclean seven days.

For thus saith the LORD, Enter not into the house of mourning, neither go to lament nor bemoan them: for I have taken away my peace from this people, saith the LORD, even lovingkindness and mercies.

Son of man, behold, I take away from thee the desire of thine eyes with a stroke: yet neither shalt thou mourn nor weep, neither shall thy tears run down. Forbear to cry, make no mourning for the dead, bind the tire of thine head upon thee, and put on thy shoes upon thy feet, and cover not thy lips, and eat not the bread of men. So I spake unto the people in the morning: and at even my wife died; and I did in the morning as I was commanded.

And another of his disciples said unto him, Lord, suffer me first to go and bury my father.