That the Messenger of Allah (ﷺ) said, "Whoever prepares a fighter in Allah's cause, or looks after the family of a fighter, then he has participated in a military expedition."

This Hadith is Hasan Sahih.
Jami` at-Tirmidhi Book 22, Hadith 11
← Previous Hadith That the Messenger of Allah (ﷺ) said, "Whoever prepares a fighter in Allah's cause, he has participated in a military expedition, and whoever looks after the family of a fighter, he has participated in a military expedition."

This Hadith is Hasan Sahih, and it has been reported through more than one route.

Jami` at-Tirmidhi Book 22, Hadith 10 Next Hadith → That the Prophet (ﷺ) said similarly.

Jami` at-Tirmidhi Book 22, Hadith 12