John Gill Commentary Acts 10:29

"wherefore also I came without gainsaying, when I was sent for. I ask therefore with what intent ye sent for me." — Acts 10:29 (ASV)

Therefore came I to you, without gainsaying
Readily and cheerfully, without objecting to it, or saying one word against it, or making any excuse to put it off:

as soon as I was sent for :
he immediately consented to go, as soon as ever the messengers from Cornelius acquainted him with their message, being previously directed so to do by the Spirit of God; though he did not set out with them till the next day, it being more suitable and convenient:

I ask therefore for what intent you have sent for me ?
this he said, not as ignorant of the true cause, for he had inquired of the messengers, who had informed him of the reason of it; but he was willing to have it from the mouth of Cornelius himself; not only for further confirmation's sake, but for order sake, to lead him on regularly to what he had to say.