abuaminaelias.com
Qurtubi on Jihad: Best jihad to build a mosque, teach good | Daily Hadith Online
Al-Qurtubi reported: Ibn Abbas, may Allah be pleased with him, said, "The best jihad is to build a mosque and to teach the Quran, the Sunnah, and the law therein." Source: Tafsīr al-Qurṭub