Numbers 20:29
Context20:29 When all the community saw that Aaron was dead, the whole house of Israel mourned for Aaron thirty days.
Deuteronomy 21:13
Context21:13 discard the clothing she was wearing when captured, 1 and stay 2 in your house, lamenting for her father and mother for a full month. After that you may have sexual relations 3 with her and become her husband and she your wife.
Deuteronomy 34:8
Context34:8 The Israelites mourned for Moses in the deserts of Moab for thirty days; then the days of mourning for Moses ended.