Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Sahl bin Abi Hathmah (may Allah be pleased with him) that the Noble Prophet (peace and blessings of Allah be upon him) said: "When a man feels a desire in his heart to propose to a woman, he should (first) look at her; there is no harm in that."

Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "When any one of you sends a proposal to a woman, he should look at that quality in her because of which he wants to marry her."

It is narrated from Sayyiduna Abu Humayd (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "When a man sends a proposal of marriage to a woman, there is no harm in looking at her, even if she is unaware of it, provided that he is looking at her because of the proposal."

Abu Hurairah (may Allah be pleased with him) narrates that a man wanted to marry an Ansari woman. The Prophet (peace and blessings be upon him) said to him: "Look at her, for the eyes of the Ansar (women) are (generally) small."

Sayyiduna Mughirah bin Shu’bah (may Allah be pleased with him) sent a marriage proposal to a woman. The Prophet Muhammad (peace and blessings be upon him) said to him: “Look at her, for it is more likely that love will be established between you because of that.”