Musnad Ahmad Hadith 21933

It is narrated from Safina (may Allah be pleased with him) that once a man came as a guest to Ali (may Allah be pleased with him). He prepared food for him, so Fatimah (may Allah be pleased with her) said, "If we invite the Holy Prophet (ﷺ), he would also eat food with us." So they sent for the Holy Prophet (ﷺ). The Holy Prophet (ﷺ) came. When the Holy Prophet (ﷺ) held the door's handles, he saw that a curtain was hanging in one corner of the house. As soon as the Holy Prophet (ﷺ) saw it, he turned back. Fatimah (may Allah be pleased with her) said to Ali (may Allah be pleased with him), "Go after him and ask the reason for his return." Ali (may Allah be pleased with him) followed and said, "O Messenger of Allah! Why did you return?" The Holy Prophet (ﷺ) said, "It is not appropriate for me or for any Prophet to enter a house which is adorned and decorated in such a manner."