My question is if there are any supplications that we can recite to have children as my wife and I wish to have children.

by

Recite this dua 70 times
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O Lord do not let me alone while you are the best inheritors, and make me a guardian who inherits me in my life and prays forgivness for me after my death, and him born in good health, and do not make Satan a share, God I seek your forgiveness and I repent to you, as you are the merciful the forgiver.

Is this duaa to be read once or daily?
Also, I shall be applying for a job promotion, is there a supplication that I can read to hasten a promotion?

You can repeat it.
For all your needs, recite isteghfar all the time.
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