Commentary for Numbers 22:8

לינו פה הלילה LODGE HERE THIS NIGHT — The Holy Spirit rested upon him only at night time, and similarly in the case of all the prophets of the heathen peoples, and similarly He revealed Himself to Laban in a dream at night, as it is said, (Genesis 31:24) “And God came to Laban in a dream of the night” — as a man who comes to his concubine furtively (cf. Leviticus Rabbah 1 13; Rashi on Job 12:4).

כאשר ידבר ה' אלי, for I am preparing myself to receive a prophetic message.

לינו פה, "stay here overnight." Bileam may have meant that the messengers stay overnight in his own home, and that is what he meant by the word פה, "here." He concluded by saying that he would tell them what G'd was going to say, כאשר ידבר, not what G'd had said. He hinted that by staying overnight at his home he could inform them immediately G'd would give him instructions. When he emphasised הלילה, "this night," he might have inadvertently revealed his miserly nature as he was not willing to play host to them for more than one night.