Leviticus 10:6

And Moses said unto Aaron, and unto Eleazar and unto Ithamar, his sons, Uncover not your heads, neither rend your clothes; lest ye die, and lest wrath come upon all the people: but let your brethren, the whole house of Israel, bewail the burning which the LORD hath kindled.

A Random Prayer...

Prayer in Time of Sickness or Trial

O good Jesus, I accept willingly this sickness [or trial] which it has pleased you to lay upon me. I confide all my pains to your Sacred Heart, and beg you to unite them with your bitter sufferings, and thus perfect them by making them your own. Since I cannot render you the praise due to you because of the multitude of my sorrows and afflictions, I ask you to praise God the Father for all I suffer, with the same tribute of praise you offered him when your agony on the Cross was at its height. As you thanked him with all the powers of your soul for all the sufferings and injustice which he willed you should endure, so, I pray you, give him thanks for my trials also. Offer my sufferings, physical and spiritual, to him together with your most holy pains to his eternal honor and glory. Amen.

more prayers...