וַיַּעֲמֹ֣ד שְׁלֹמֹ֗ה לִפְנֵי֙ מִזְבַּ֣ח יְהוָ֔ה נֶ֖גֶד כָּל־קְהַ֣ל יִשְׂרָאֵ֑ל וַיִּפְרֹ֥שׂ כַּפָּ֖יו הַשָּׁמָֽיִם׃
Salomo trat vor den Altar des Herrn in Gegenwart der ganzen Versammlung Israels und breitete seine Hände gen Himmel
Rashi
And Shlomo stood before the Altar of Adonoy. [As] it is written, “and Shlomo made a copper basin and had set it in the midst of the court, etc. and upon it he stood, and knelt on his knees.”15Even though a king of Yisroel is allowed to sit in the Beis Hamikdosh [See II Shmuel 7:18], Shlomo chose to stand.16II Divrei Hayomim 6:13.