Jacob uttered a prayer in the form of a vow. After asking for God’s support, he solemnly promised: “As for everything that you will give me I shall without fail give the tenth of it to you. ”
فَبَعْدَمَا طَلَبَ ٱلدَّعْمَ مِنَ ٱللهِ ،‏ قَطَعَ هذَا ٱلْوَعْدَ ٱلْجِدِّيَّ :‏ « كُلُّ مَا تُعْطِينِي فَإِنِّي أُقَدِّمُ لَكَ عُشْرَهُ » .‏