Números 25:2 Comentário: Rashi, Or HaChaim, Rabbeinu Bahya & Siftei Chakhamim

וישתחוו לאלהיהן AND THEY PROSTRATED THEMSELVES BEFORE THEIR GODS — When anyone’s passions overpowered him and he said to her, “Submit to me”, she took out for him an image of Peor from her bosom, saying to him, “First prostrate yourself before this" (Midrash Tanchuma, Balak 18).

ותקראן לעם, They called to the people. The reason the Torah had to repeat the word לעם having previously described the people involved as העם is that not all of these people went for strolls so that they encountered the Moabite women. Our verse indicates that the Moabite women went out to seek out Israelites who had not gone strolling in the neighbourhood around their camp. An alternative explanation could be that they wanted to involve the Israelites in a group activity thus breaking down each Israelite's inhibition against committing sinful acts. They were invited to partake of the meals prepared by the Moabite women in honour of their idols.

ויאכל העם וישתחוו לאלוהיהן, “the people ate and prostrated themselves in front of their deities.” The mixture of the use of feminine and masculine pronoun endings means that both the Israelites and the Moabites prostrated themselves to these deities.