Deuteronomy 34:8

The usual period of mourning seems to have been thirty days: see Numbers 20:29; Genesis 50:3, and cp. Deuteronomy 21:13. Of these the first seven were more stringently observed: see Genesis 50:10. In addition to the natural manifestations of grief, mourning in the East was, and still is, accompanied with a great deal of ceremony: see e.g. Jeremiah 9:17; Jeremiah 16:6; Ezekiel 24:16; Matthew 9:23. The mourning for Moses was doubtless very genuine. Like many another great person, he was better appreciated after his death than during his lifetime. In his life he was much tried by the murmuring, disobedience, and jealousy of those for whom he lived, but these same people made great lamentation for him when he was dead.