John Calvin on Exodus 18:7-9

7. And Moses went out. In the foregoing verse he had related what happened last, viz., that Jethro said, I am come, and have brought to thee thy wife and children; but this transposition is common in Hebrew. Now, then, he adds, that Moses went to meet him, and to pay him honor; and that they met each other with mutual kindness, and respectively performed the duties of affection. “To ask each other of their peace,” So in margin A. V. is tantamount to inquiring whether things were well and prospering. But the main point is, that Moses told him how gracious God had been to His people; for this was the drift of the whole of his address, that, when he had left his father-in-law, he had not yielded to the impulse of lightness, but had obeyed the call of God, as had afterwards been proved by His extraordinary aids and by heavenly prodigies.