וַיָּ֧קָם אַבְרָהָ֛ם וַיִּשְׁתַּ֥חוּ לְעַם־הָאָ֖רֶץ לִבְנֵי־חֵֽת׃
At tumindig si Abraham at yumukod sa mga tao ng lupain, sa mga anak ni Het.
Chizkuni
“Avraham stood up and prostrated himself;” Avraham was dependent on the goodwill of everyone in that town; even if Efron had been willing to sell his field or plot Avraham would have needed all the townspeople’s permission to convert it into a burial site. Avraham had to first arise in order to prostrate himself in the appropriate manner to all of them, even to the one sitting behind him. But for a single individual such as Efron he was not required to rise, he just prostrated himself before him.
Sforno
וישתחו לעם הארץ לבני חת. He bowed to the notables present, seeing they represented the whole population.
Or HaChaim
ויקם…וישתחו… He arose and bowed down. Abraham explained to them that the reality was the exact opposite of what the Hittites thought. He did not consider himself as a prince amongst them; on the contrary, he considered them as deserving more honour than himself.