Jamieson, Fausset and Brown on 1 Samuel 9:3

3. the asses of Kish Saul's father were lost. And Kish said to Saul ... arise, go seek the asses--The probability is that the family of Kish, according to the immemorial usage of Oriental shepherds in the purely pastoral regions, had let the animals roam at large during the grazing season, at the close of which messengers were despatched in search of them. Such travelling searches are common; and, as each owner has his own stamp marked on his cattle, the mention of it to the shepherds he meets gradually leads to the discovery of the strayed animals. This ramble of Saul's had nothing extraordinary in it, except its superior directions and issue, which turned its uncertainty into certainty.