Then it was he entered into a very definite covenant with Almighty God, and in prayer vowed a vow unto the Lord, saying, “If God will be with me, and will keep me in this way that I go, and will give me bread to eat and raiment to put on, so that I come again to my father’s house in peace; and shall the Lord be my God, and this stone which I have set for a pillar shall be God’s house; and of all that thou shalt give me, I will surely give one-tenth unto thee.” With a deep sense of his utter dependence upon God, and desiring above all the help of God, Jacob conditioned his prayer for protection, blessing and guidance by a solemn vow. Thus Jacob supported his prayer to God by a vow. Twenty years had passed while Jacob tarried at the house of Laban, and he had married two of his daughters and God had given him children. He had increased largely in wealth, and he resolved to leave that place and return home to where he had been reared. Nearing home it occurred to him that he must meet his brother Esau, whose anger had not abated notwithstanding the passage of many years. God, however, had said to him, “Return to thy father’s house and to thy kindred, and I will be with thee.” In this dire emergency doubtless God’s promise and his vow made long ago came to his mind, and he took himself to an all-night season of prayer. Here comes to our notice that strange, inexplicable incident of the angel struggling with Jacob all night long, till Jacob at last obtained the victory. “I will not let thee go except thou bless me.” And then and there, in answer to his earnest, pressing and importunate praying, he was richly blessed personally and his name was changed. But even more than that, God went ahead of Jacob’s desire, and strangely moved upon the angry nature of Esau, and lo and behold, when Jacob met him next day, Esau’s anger had entirely abated, and he vied with Jacob in showing kindness to his brother who had wronged him. No explanation of this remarkable change in the heart of Esau is satisfactory which leaves out prayer. Samuel, the mighty intercessor in Israel and a man of God, was the product of his mother’s prayer. Hannah is a memorable example of the nature and benefits of importunate praying. No son had been born to her and she yearned for a man child. Her whole soul was in her desire. So she went to the house of worship, where Eli, the priest of God, was, and staggering under the weight of which bore down on her heart she was beside herself and seemed to be really intoxicated. Her desires were too intense for articulation. “She poured out her soul in prayer before the Lord.” Insuperable natural difficulties were in the way, but she “multiplied her praying,” as the passage means, till her God-lightened heart and her bright face recorded the answer to her prayers, and Samuel was hers by a conscious faith and a nation was restored by faith.