Reference for I Samuel 15:31

וַיָּ֥שָׁב שְׁמוּאֵ֖ל אַחֲרֵ֣י שָׁא֑וּל וַיִּשְׁתַּ֥חוּ שָׁא֖וּל לַֽיהוָֽה׃ (ס)

So Samuel returned after Saul; and Saul worshipped the LORD.

BDB