The words of the Torah stating that Allah would only realize His Promise to the Jews on the condition that they love Him and obey Him
And when you and your children return to the LORD your God and obey Him with all your heart and with all your soul according to everything I command youtoday then the LORD your God will restore your fortunes and have compassion on you and gather you again from all the nations where He scattered you. Even if you have been banished to the most distant land under the heavens, from there the LORD your God will gather you and bring you back. He will bring you to the land that belonged to your fathers ... He will make you more prosperous and numerous than your fathers… Then the LORD your God will make you most prosperous in all the work of your hands and in the fruit of your womb, the young of your livestock and the crops of your land. The LORD will again delight in you and make you prosperous, just as he delighted in your fathers, if you obey the LORD your God and keep his commands and decrees ... and turn to the LORD your God with all your heart and with all your soul.(Deuteronomy, 30:2-10)
Some of the blessings promised to Jews when they comply with the commands of Allah
If you fully obey the LORD your God and carefully follow all His commands I give you today... all these blessings will come upon you and accompany you if you obey the LORD your God: "You will be blessed in the city and blessed in the country... The fruit of your womb will be blessed, and the crops of your land and the young of your livestock--the calves of your herds and the lambs of your flocks. Your basket and your kneading trough will be blessed. You will be blessed when you come in and blessed when you go out... The Lord will send a blessing on your barns and on everything you put your hand to. The Lord your God will bless you in the land he is giving you... if you keep the commands of the Lord your God and walk in His ways... The Lord will open the heavens, the storehouse of his bounty, to send rain on your land in season and to bless all the work of your hands... If you pay attention to the commands of the Lord your God that I give you this day and carefully follow them...(Deuteronomy, 28:1-14)
Some of the threats of Allah upon Jews when they do not live with the fear of Allah, with the love for Allah, when they do not comply with the commands of faith.
However, if you do not obey the Lord your God and do not carefully follow all His commands and decrees I am giving you today, all these curses will come upon you and overtake you: You will be cursed in the city and cursed in the country... The Lord will send on you curses, confusion and rebuke in everything you put your hand to, until you are destroyed and come to sudden ruin because of the evil you have done in forsaking him... you will become a thing of horror to all the kingdoms on earth… You will be unsuccessful in everything you do; day after day you will be oppressed and robbed, with no one to rescue you.. You will build a house, but you will not live in it. You will plant a vineyard, but you will not even begin to enjoy its fruit… You will have nothing but cruel oppression all your days… You will sow much seed in the field but you will harvest little… All these curses will come upon you… because you did not obey the Lord your God and observe the commands and decrees he gave you… therefore in hunger and thirst, in nakedness and dire poverty… If you… do not revere this glorious and awesome name—the Lord your God—the Lord will send fearful plagues on you and your descendants, harsh and prolonged disasters, and severe and lingering illnesses… You who were as numerous as the stars in the sky will be left but few in number, because you did not obey the Lord your God… Then the Lord will scatter you among all nations, from one end of the earth to the other… Among those nations you will find no repose, no resting place for the sole of your foot. There the Lord will give you an anxious mind, eyes weary with longing, and a despairing heart. You will live in constant suspense, filled with dread both night and day, never sure of your life…(Deuteronomy, 28:15-68)