'Mourning' in the Bible

Remove her prisoner's clothing and let her remain for a month in your house, mourning her parents. After that, you may become her husband and she is to become your wife.

I have not eaten thereof in my mourning, neither have I taken away ought thereof for any unclean use, nor given ought thereof for the dead: but I have hearkened to the voice of the LORD my God, and have done according to all that thou hast commanded me.

And the children of Israel wept for Moses in the plains of Moab thirty days: so the days of weeping and mourning for Moses were ended.