Volume 5, Book 59, Number 285:
Narrated Abu Ishaq:
Once, while I was sitting beside Zaid bin Al-Arqam, he was asked, “How many Ghazwat did the
Prophet undertake?” Zaid replied, “Nineteen.” They said, “In how many Ghazwat did you join him?”
He replied, “Seventeen.” I asked, “Which of these was the first?” He replied, “Al-‘Ashira or Al-‘Ashiru.”