David was in the stronghold at the time, while a Philistine garrison was in Bethlehem. ¹ 

David son of Jesse reigned over all Israel.

When David was old and approaching the end of his life, ¹  he made his son Solomon king over Israel.

while David and all Israel were energetically ¹  celebrating before God, singing and playing various stringed instruments, ²  tambourines, cymbals, and trumpets.

David was wrapped in a linen robe, as were all the Levites carrying the ark, the musicians, and Kenaniah the supervisor of transport and the musicians; ¹  David also wore a linen ephod. ² 

In the spring, at the time when kings normally conduct wars, ¹  Joab led the army into battle and devastated the land of the Ammonites. He went and besieged Rabbah, while David stayed in Jerusalem. Joab defeated Rabbah and tore it down.