'Oil' in the Bible

Then Samuel took a flask of oil and poured it over his head and kissed him and said, "{Has not} Yahweh anointed you as leader over his inheritance?

Then Yahweh said to Samuel, "{How long} will you mourn about Saul? I have rejected him from being king over Israel! Fill up your horn [with] oil and go. I will send you to Jesse the Bethlehemite, for I have chosen a king for myself among his sons."

So Samuel took the horn of oil and anointed him in the midst of his brothers. Then the Spirit of Yahweh rushed upon David from that day {on}. Then Samuel got up and went to Ramah.