Musnad Ahmad 1257:1

Yahya ibn Sa'id narrated to us, from Yahya ibn Sa'id, and Ya'la said: Yahya narrated to us, from Bashir ibn Yasar, from Husayn ibn Mihsan, that an aunt of his came to the Prophet, may God bless him and grant him peace, for a need. When she had finished her need, he said to her: "Are you married?" She said: "Yes." He said: "And how are you toward him?" — Ya'la said: "And how are you for him?" — She said: "I do not neglect him, except for what I am unable to do." He said: "Look at where you stand in relation to him, for he is your Paradise and your Fire."