Musnad Ahmad 659:2

Husayn ibn Muhammad narrated to us, Shayban narrated to us, from Mansur; and 'Affan said: Shu'bah narrated to us, Mansur narrated to us, from Ibrahim, from al-Aswad, from Abu al-Sanabil ibn Ba'kak, who said: Subay'ah bint al-Harith gave birth twenty-three or twenty-five nights after the death of her husband. When she had recovered, she adorned herself for marriage. That was disapproved of for her, and that was mentioned to the Prophet, peace and blessings of Allah be upon him. He said: "If she does that, then her term has ended." 'Affan said: "Then her term has expired."