Reference: Mourning Customs
Hastings
The Oriental expression of grief has a twofold relationship. Towards God it is marked by silent and reverent submission symbolized by placing the hand on the mouth. 'The Lord gave and the Lord hath taken away' (Job 1:21); 'I was dumb
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"And when you fast, do not look gloomy, like the hypocrites, for they disfigure their faces that they may be seen by men to be fasting. Truly, I say to you, they have received their reward. But when you fast, anoint your head and wash your face, read more. so that you do not appear to be fasting to men, but to your Father who is in secret; and your Father who sees in secret will reward you.
When they came to the house of the ruler of the synagogue, he saw a tumult, and people weeping and wailing loudly.
Rejoice with those who rejoice, weep with those who weep.
Therefore comfort one another with these words.
For the Lamb in the center of the throne will be their shepherd, and he will guide them to springs of living water; and God will wipe away every tear from their eyes."