A caution to the sons of Sion: : being an answer to Jeremiah Ives his book, intituled, the great case of conscience opened. I. Proving that every calling God to witnesse is not swearing. II. Proving that promissary oaths were never commanded by God, onely practised as liberty under former dispensations. III. Proving that promissary oaths were never commanded or practised by Christ nor his disciples in all the New Testament. IV. Shewing what an oath is. V. Proving the lawfulnesse of all promissary oaths in the time of the Gospel. /