He waited for seven days, the time period indicated by Samuel. ¹  But Samuel did not come to Gilgal, and the army began to abandon Saul. ² 

After David had entrusted his cargo to the care of the supply officer, ¹  he ran to the battlefront. When he arrived, he asked his brothers how they were doing.

So whenever the spirit from God would come upon Saul, David would take his lyre and play it. This would bring relief to Saul and make him feel better. Then the evil spirit would leave him alone. ¹ 

David strapped on his sword over his fighting attire and tried to walk around, but he was not used to them. ¹  David said to Saul, “I can’t walk in these things, for I’m not used to them.” So David removed them.