Surah Al-Ma'idah 5:21

يَـٰقَوْمِ ٱدْخُلُوا۟ ٱلْأَرْضَ ٱلْمُقَدَّسَةَ ٱلَّتِى كَتَبَ ٱللَّهُ لَكُمْ وَلَا تَرْتَدُّوا۟ عَلَىٰٓ أَدْبَارِكُمْ فَتَنقَلِبُوا۟ خَـٰسِرِينَ

O my people, enter the blessed land [i.e., Palestine] which Allāh has assigned to you and do not turn back [from fighting in Allāh's cause] and [thus] become losers."

Translation: Saheeh International

Tafsir

O my people enter the Holy the purified Land which God has ordained for you which He commanded you to enter and this is Syria al-shām and do not turn back in flight do not retreat in fear of the enemy or you will end up as losers’ in your efforts.

Excerpt from Tafsir al-Jalalayn, commentary on 5:21, via Quran.com. The reader has the full commentary and 9 more tafsirs.