Avoid suspicious websites promising a “free PDF download” with pop-up ads or requiring credit card information. Many of these are phishing scams. Stick to .edu, .org (trusted), or established Arabic digital libraries.
This is a critical point. As Muslims, we are commanded to respect intellectual property and the rights of authors. Dr. Wahbah al-Zuhayli’s family and publishing houses (such as Dar al-Fikr in Damascus/Dubai) hold the rights to this work. al asas fi tafsir pdf