Leviticus 21:5 They shall not make baldness upon their head, neither shall they shave off the corner of their beard, nor make any cuttings in their flesh.
God’s people were not to mourn like others even in the Old Testament. We do not exaggerate our loss. We know that our people, our family, those that love God and know Jesus will go to heaven. The heathen obviously would cut themselves and make visible signs of their loss. They didn’t know God. They didn’t know what happened after death but God’s people do.
So we can mourn. We can grieve but we will grieve in faith knowing that God will care for those that we love and that loved Him!