Genesis 20:17
"So Abraham prayed unto God: and God healed Abimelech, and his wife, and his maidservants; and they bare children."
Cross References (ranked by relevance)
Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.
The sacrifice of the wicked is an abomination to the LORD: but the prayer of the upright is his delight.
Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.
And all things, whatsoever ye shall ask in prayer, believing, ye shall receive.
Brethren, pray for us.
Now therefore restore the man his wife; for he is a prophet, and he shall pray for thee, and thou shalt live: and if thou restore her not, know thou that thou shalt surely die, thou, and all that are thine.
Thus saith the LORD, the Holy One of Israel, and his Maker, Ask me of things to come concerning my sons, and concerning the work of my hands command ye me.
And when the LORD saw that Leah was hated, he opened her womb: but Rachel was barren.
Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you:
That they may offer sacrifices of sweet savours unto the God of heaven, and pray for the life of the king, and of his sons.
Yea, and all the prophets from Samuel and those that follow after, as many as have spoken, have likewise foretold of these days.
The LORD is far from the wicked: but he heareth the prayer of the righteous.