Al-Baqarah 2:235 ولا جناح عليكم فيما عرضتم به من خطبة النساء او اكننتم في انفسكم علم الله انكم ستذكرونهن ولاكن لا تواعدوهن سرا الا ان تقولوا قولا معروفا ولا تعزموا عقدة النكاح حتى يبلغ الكتاب اجله واعلموا ان الله يعلم ما في انفسكم فاحذروه واعلموا ان الله غفور حليم ٢٣٥

You will not be blamed whether you give a hint that you wish to marry these women, or keep it to yourselves- God knows that you intend to propose to them. Do not make a secret arrangement with them; speak to them honourably and do not confirm the marriage tie until the prescribed period reaches its end. Remember that God knows what is in your souls, so be mindful of Him. Remember that God is most forgiving and forbearing.