1)
Why does it say "va'Yakumu va'Yelchu Lifnei Sha'ul"?
1.
Rashi: Later, he will follow them. They went first to search precisely.
2.
Radak: These Zifim returned to Zif. The verses do not say that they returned after learning his precise location, but since it says (verse 25) and Sha'ul and his men went, we infer that they returned first.
3.
Malbim: [After the first Zifim returned to Zif and learned his precise location, they returned and told Sha'ul. Those who returned now] went back to Zif, and Sha'ul followed them.
