It was narrated that Abu Hurairah said: "A man proposed to a woman from among the Ansar and the Messenger of Allah said to him: 'Have you seen her?' He said: 'No.' So he told him to look at her."  

لَهُ رَسُولُ اللَّهِ ﷺ هَلْ نَظَرْتَ إِلَيْهَا قَالَ لاَ فَأَمَرَهُ أَنْ يَنْظُرَ إِلَيْهَا  

It was narrated that Al-Mughirah bin Shu'bah said: "I proposed marriage to a woman during the time of the Messenger of Allah, and the Prophet said: 'Have you seen her?' I said: 'No.' He said: 'Look at her, for that is more likely to create love between you.'"  

خَطَبْتُ امْرَأَةً عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ فَقَالَ النَّبِيُّ ﷺ أَنَظَرْتَ إِلَيْهَا قُلْتُ لاَ قَالَ فَانْظُرْ إِلَيْهَا فَإِنَّهُ أَجْدَرُ أَنْ يُؤْدَمَ بَيْنَكُمَا