Acts 10:9 - Matthew Poole's English Annotations on the Holy Bible

These houses were flat on the tops, and therefore they were commanded to make battlements for them, Deuteronomy 22:8. Peter went up upon the housetop to pray, that he might from thence view the temple, which was a type of Christ, through whom only we and our prayers can be acceptable unto God; hence, 1 Kings 8:30, &c., there is so often mention made of praying towards the city, and towards the place which God should choose; this Daniel practised, though upon the hazard of his life, when both city and temple were ruined, Daniel 6:10. The sixth hour with them is high noon, or midday, and is accounted one of the three times of prayer, \see Acts 3:1\ and was, as the Jews say, recommended to them by Isaac; howsoever, it was the time when they might begin to prepare the evening sacrifice: none of these causes need to be assigned, for doubtless this blessed apostle did watch unto prayer, 1 Peter 4:7, and desirously laid hold upon all opportunities to pour out his soul unto God.