וַיֵּלְכ֨וּ כָל־הָעָ֜ם הַגִּלְגָּ֗ל וַיַּמְלִכוּ֩ שָׁ֨ם אֶת־שָׁא֜וּל לִפְנֵ֤י יְהוָה֙ בַּגִּלְגָּ֔ל וַיִּזְבְּחוּ־שָׁ֛ם זְבָחִ֥ים שְׁלָמִ֖ים לִפְנֵ֣י יְהוָ֑ה וַיִּשְׂמַ֨ח שָׁ֥ם שָׁא֛וּל וְכָל־אַנְשֵׁ֥י יִשְׂרָאֵ֖ל עַד־מְאֹֽד׃ (פ)
And all the people went to Gilgal; and there they made Saul king before the LORD in Gilgal; and there they sacrificed sacrifices of peace-offerings before the LORD; and there Saul and all the men of Israel rejoiced greatly.
Chizkuni
ויעלו עולות, “they offered burnt offerings.” These burnt offerings were offered quite innocently in honour of Hashem. [We find something similar in Samuel I 11,15, on the occasion of the first Jewish King, King Shaul being crowned at Gilgal, though at that time the offerings were meat offerings most of which could be eaten by the people present at the celebration. Ed.]