Pharaoh hastened to call to Moses and to Aaron, and he said, “I have offended before the LORD your God and before you. And now, forgive, pray, my offense, just this time, and entreat the LORD your God…Pharaoh first mentions that he’s sinned against God and only then does he mention his sin against Moses and Aaron. However, he first asks forgiveness from Moses and Aaron and only then requests they pray to God on his behalf. Kli Yakar explains that to sin against God is greater and so Pharaoh first mentions it; forgiveness from humans is harder, and so it is Pharaoh’s first request. Furthermore, when God sees that people get along with one another then He more easily forgives.