Jamieson, Fausset and Brown on Exodus 18:7

7. Moses went out to meet his father-in-law, &c.--Their salutations would be marked by all the warm and social greetings of Oriental friends (see on Ex 4:27)--the one going out to "meet" the other, the "obeisance," the "kiss" on each side of the head, the silent entrance into the tent for consultation; and their conversation ran in the strain that might have been expected of two pious men, rehearsing and listening to a narrative of the wonderful works and providence of God.