Why is there a Yud in "Tavonah"?
Radak: This is like "Tevo'enah b'Heichal Melech" (Tehilim 45:16), in which the Aleph is pronounced; here, it is silent.
Why should Sha'ul wait for these signs?
Rashi: Then he will know that just like these signs came true, also my (Shmuel's) words about the kingship. 1
Malbim: This shows that he will be aided from the castes in the nation, each according to its level.
Shmuel was an established Navi for about eight years. Why should Sha'ul have any doubt? Perhaps he could be worried lest he lose it due to sin. (PF)
Why should Sha'ul do after the signs come?
Targum Yonasan: Establish for yourself royal clothes. Rashi - and prepare for yourself royal matters, as much as you can.
Radak #1: Do whatever you want, for Hashem is with you.
Radak #2: He hinted to him about war with Nachash ha'Amoni.
Malbim: Then, do not rely on help from others, only from Hashem.
