1It shall be, when you have come in to the land which Yahweh your God gives you for an inheritance, possess it, and dwell in it, 2that you shall take some of the first of all the fruit of the ground, which you shall bring in from your land that Yahweh your God gives you. You shall put it in a basket, and shall go to the place which Yahweh your God shall choose to cause his name to dwell there. 3You shall come to the priest who shall be in those days, and tell him, “I profess today to Yahweh your God, that I have come to the land which Yahweh swore to our fathers to give us.” 4The priest shall take the basket out of your hand, and set it down before Yahweh your God’s altar. 5You shall answer and say before Yahweh your God, “My father was a Syrian ready to perish. He went down into Egypt, and lived there, few in number. There he became a great, mighty, and populous nation. 6The Egyptians mistreated us, afflicted us, and imposed hard labor on us. 7Then we cried to Yahweh, the God of our fathers. Yahweh heard our voice, and saw our affliction, our toil, and our oppression. 8Yahweh brought us out of Egypt with a mighty hand, with an outstretched arm, with great terror, with signs, and with wonders; 9and he has brought us into this place, and has given us this land, a land flowing with milk and honey. 10Now, behold, I have brought the first of the fruit of the ground, which you, Yahweh, have given me.” You shall set it down before Yahweh your God, and worship before Yahweh your God. 11You shall rejoice in all the good which Yahweh your God has given to you, and to your house, you, and the Levite, and the foreigner who is among you.
12When you have finished tithing all the tithe of your increase in the third year, which is the year of tithing, then you shall give it to the Levite, to the foreigner, to the fatherless, and to the widow, that they may eat within your gates and be filled. 13You shall say before Yahweh your God, “I have put away the holy things out of my house, and also have given them to the Levite, to the foreigner, to the fatherless, and to the widow, according to all your commandment which you have commanded me. I have not transgressed any of your commandments, neither have I forgotten them. 14I have not eaten of it in my mourning, neither have I removed any of it while I was unclean, nor given of it for the dead. I have listened to Yahweh my God’s voice. I have done according to all that you have commanded me. 15Look down from your holy habitation, from heaven, and bless your people Israel, and the ground which you have given us, as you swore to our fathers, a land flowing with milk and honey.”
16Today Yahweh your God commands you to do these statutes and ordinances. You shall therefore keep and do them with all your heart and with all your soul. 17You have declared today that Yahweh is your God, and that you would walk in his ways, keep his statutes, his commandments, and his ordinances, and listen to his voice. 18Yahweh has declared today that you are a people for his own possession, as he has promised you, and that you should keep all his commandments. 19He will make you high above all nations that he has made, in praise, in name, and in honor, and that you may be a holy people to Yahweh your God, as he has spoken.
Jacob was the son of Isaac and Rebekah, born immediately after Esau, and Abraham was his grandfather. He achieved the right of the firstborn by trickery, in offering his older brother, Esau, food in exchange for the birthright, who cared little for this position. He also received the blessing of firstborn from his father Jacob before his death by cunning, and with the assistance of his mother Rebekah.
After his deception of Esau, receiving the blessing from his father, Jacob escaped to his uncle Laban, who in turn deceived Jacob into working for fourteen years for the marriage of Jacob to Leah, and then his beloved Rachel. Laban also sought to deceive Jacob of wages, but God intervened to ensure he would prosper. In a time of trial, when he feared the wrath of Esau, upon returning to the land of Canaan, Jacob had an encounter with God, and his name was changed to Israel, the one who wrestles with God. Even though his early life was characterized by deception, God worked through the situation to ensure that Jacob would be the one in the line of the patriarchs, to create a great nation and ultimately fulfill His purposes in the earth, especially through the future Messiah. The Messiah would guarantee the promise of the land to Abram and a person who would rule over Abraham's descendants, but also He would bring blessings to all the people of the earth (Gen 12:1-3).
In spite of Jacob's early failure by deception, God worked through him, and finally, Jacob became a different type of man after his struggle with God. As one has said,
"Despite Jacob’s faults, God chose him to be the leader of a great nation that still bears his name today. But for this, it is unlikely that we would know much about Jacob, who appears to be in the middle of events while the key players are those around him. There is no great wisdom or bravery in Jacob to speak of, and we are tempted to see him as little more than God’s passive instrument. If we are tempted to think that, because we aren’t in the spotlight performing great acts for God, we are unimportant to Him, then we should consider the life of Jacob and know that, in spite of our failings, God can and will still use us in His plan."
For more on Jacob, see "Who was Jacob in the Bible?", https://www.gotquestions.org/life-Jacob.html