2:235
وَ لَا جُنَاحَ عَلَيْ كُمْ فِي مَا عَرَّضْ تُم بِ هِۦ مِنْ خِطْبَةِ ٱل نِّسَآءِ أَوْ أَكْنَن تُمْ فِىٓ أَنفُسِ كُمْ عَلِمَ ٱللَّهُ أَنَّ كُمْ سَ تَذْكُرُ ونَ هُنَّ وَ لَٰكِن لَّا تُوَاعِدُ و هُنَّ سِرًّا إِلَّآ أَن تَقُولُ وا۟ قَوْلًا مَّعْرُوفًا وَ لَا تَعْزِمُ وا۟ عُقْدَةَ ٱل نِّكَاحِ حَتَّىٰ يَبْلُغَ ٱلْ كِتَٰبُ أَجَلَ هُۥ وَ ٱعْلَمُ وٓا۟ أَنَّ ٱللَّهَ يَعْلَمُ مَا فِىٓ أَنفُسِ كُمْ فَ ٱحْذَرُ و هُ وَ ٱعْلَمُ وٓا۟ أَنَّ ٱللَّهَ غَفُورٌ حَلِيمٌ
There is no blame upon you for that to which you [indirectly] allude concerning a proposal to women or for what you conceal within yourselves. Allah knows that you will have them in mind. But do not promise them secretly except for saying a proper saying. And do not determine to undertake a marriage contract until the decreed period reaches its end. And know that Allah knows what is within yourselves, so beware of Him. And know that Allah is Forgiving and Forbearing.