Yahya related to me from Malik from Muhammad ibn Yahya ibn Habban from al-Araj from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, said, "Do not ask for a woman in marriage when another muslim has already done so".
Furthermore, this hadith also teaches us about proper etiquette when seeking marriage as well as how we should treat others with respect even if they are strangers to us. We must always remember that Allah loves those who are kind and merciful towards others regardless of their faith or background. Therefore, let us strive to emulate the example set by the Prophet ﷺ by being courteous towards one another at all times.