And David said unto Ahimelech the priest, The king hath commanded me a business, and hath said unto me, Let no man know any thing of the business whereabout I send thee, and what I have commanded thee: and I have appointed my servants to such and such a place. The king hath commanded me a business - All said here is an untruth, and could not be dictated by the Spirit of the Lord; but there is no reason to believe that David was under the influence of Divine inspiration at this time. It is well known that from all antiquity it was held no crime to tell a lie, in order to save life. Thus Diphilus: -
Ὑπολαμβανω το ψευδος επι σωτηριᾳ
Λεγομενον, ουδεν περιποιεισθαι δυσχερες.
"I hold it right to tell a lie, in order to procure my personal safety; nothing should be avoided in order to save life."
A heathen may say or sing thus; but no Christian can act thus, and save his soul, though he by doing so may save his life.