The law assigned a far-reaching religious influence to the priests. They alone could turn the favour of Jehovah towards his people by correct and effective sacrifices, and appease his wrath; they announced the will of Jehovah by his oracle; in regard to diseases and leprosy, they exercised police functions over the whole nation by means of the regulations for cleanliness and food; they could exclude any one at their discretion from the sacrifices and, consequently, from the community; and, in fine, they were in possession of the skill and knowledge with which the people were unacquainted. The priesthood arranged the chronology and the festivals, they supervised weights and measures,[405] they knew the history of the people in past ages, and their ancient covenant with the God of the ancestors. From their knowledge of the ordinances of Jehovah followed the claim which the priests made to watch over the application of these ordinances in life, the administration of law and justice. But at first this claim was put forward modestly. The old regulations about the right of blood in the time-honoured observances of justice were added to the law of ritual when this was written down (I. 385, 484); they were modified here and there by the views of the priesthood, and in some points essentially extended; and now, like the ordinances for the places of sacrifice, mode of worship, and purification, they stood opposed in many regulations to real life as ideal but hardly practicable standards. According to the view of the priests Jehovah was the true possessor of the land of Israel. He had given it to his people for tenure and use. From this conception the law derived very peculiar conclusions, which might be of essential advantage for retaining the property of the families in their hands, for keeping up the family and their possessions, on which the Hebrews laid weight, and for proprietors when in debt. To aid the debtor against the creditor, the poor against the rich, the labourer against him who gave the work, the slave against his master, is in other ways also the obvious object of the law.