Commentaries:
Jamieson, Fausset, and Brown
sanctify yourselves—by the preparations described (Exodus 19:14-15). The elders were to sanctify themselves. Samuel himself took the greatest care in the sanctification of Jesse's family. Some, however, think that the former were invited only to join in the sacrifice, while the family of Jesse were invited by themselves to the subsequent feast.
Other Jamieson, Fausset, and Brown entries containing 1 Samuel 16:5:
1 Samuel 16:1
Psalms 89:20
Jeremiah 38:26
Zephaniah 1:7
DISCLAIMER: Church of the Great God (CGG) provides these resources to aid the individual in studying the Bible. However, it is up to the individual to "prove all things, and hold fast to that which is good" (I Thessalonians 5:21). The content of these resources does not necessarily reflect the views of CGG. They are provided for information purposes only.