مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1410
The Musnad of az-Zubair bin al-'Awwam
It was narrated from az-Zubair bin al-"Awwam that a man gave a mare called Ghamrah or Ghamra" [for jihad], then he found a horse or a colt for sale which was said to be from that mare, but he was told not to buy it.
Musnad Ahmad 1410lts isnad is Sahih]