When one desires to make istikhara for marriage, then keep the person in mind whem making niyah. Then do wudhu and perform Salaat. Then praise Allah, mention His Greatness and plead:
اللَّهُمَّ إِنَّكَ تَقْدِرُ وَلَا أَقْدِرُ وَتَعْلَمُ وَلَا أَعْلَمُ وَأَنْتَ عَلَّامُالْغُيُوبِ ، فَإِنْ رَأَيْتَ أَنَّ فِي فُلَانَةِ خَيْرَاً لِي فِي دِينِي وَدُنْيَايَ وَآخِرَتِي فَاقْدُرْهَا لِي وَإِنْ كَانَ غَيْرُهَا خَيْرٌ مِنْهَا لِي فِي دِينِي وَآخِرَتِي فَاقْدُرْهَا لِي
“O Allah, You have power (control) and I have no control and You know and I do not know, and You know the condition of the Unseen. Thus if You see (deem fit) that this woman (here mention her name) is good for me concerning my Deen, world and Akhirah then grant me her control (make it possible that I marry her) and if besides her there be (another woman) which is better for me concerning Deen and Akhirah then specify her for me (grant me control over he)”.
“Istikhara” means to seek goodness from Allah (Exalted is He), meaning when one intends to do an important task they do istikhara before the task. The one who does the istikhara is as if they request Allah Almighty that, O the Knower of Unseen (Exalted is He) guide me if this task is better for me or not?
According to Bukhari, Volume 2, Book 21, Number 263:
Narrated Jabir bin ‘Abdullah :The Prophet (Sallal Laho Alaihi Wasallam) used to teach us the way of doing Istikhara, in all matters as he taught us the Suras of the Quran. He said, “If anyone of you thinks of doing any job he should offer a two Rakat prayer other than the compulsory ones and say (after the prayer):
Istikhara and Rohani Ilaj
Istikhara is asking Allah to guide one to the right sort of action concerning an important endeavor. A two rakah prayer is offered for this purpose with a special dua (supplication)One should perform Istikhara when one makes intentions of doing a task. The Hadith has recommended this.
Istikhara very easy and useful:Istikhara for Marriage,
The person performing the Istikhara should be with Ablution and wearing clean dress. He should pray two nafils of Salah and then should pray to ALLAH about the issue or the work needs to be done.
Correct Istikhra:Istikhara for Marriage,
Two rakats of nafil with the intention and after it should recite darood Sharif and then the dua of Istikhara and then in the end should recite darood sharid again.
The person should recite “Al-Samad” 1000 times with darood sharif 11 times before and after it. This should be done before sleeping.
The person should recite Surah Al-Zuha 11 times along with darood sharif before and after it.