3:137
قَدْ خَلَتْ مِن قَبْلِكُمْ سُنَنٌۭ فَسِيرُوا۟ فِى ٱلْأَرْضِ فَٱنظُرُوا۟ كَيْفَ كَانَ عَٰقِبَةُ ٱلْمُكَذِّبِينَ
Similar situations [as yours] have passed on before you, so proceed throughout the earth and observe how was the end of those who denied.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
The Wisdom Behind the Losses Muslims Suffered During Uhud
Allah states to His believing servants who suffered losses in the battle of Uhud, including seventy dead,
قَدْ خَلَتْ مِن قَبْلِكُمْ سُنَنٌ
(137... Many similar ways (and mishaps of life) were faced before you), for the previous nations who followed their Prophets before you, they too suffered losses. However, the good end was theirs, and the ultimate defeat was for the disbelievers. This is why Allah said,
فَسِيرُواْ فِى الاٌّرْضِ فَانْظُرُواْ كَيْفَ كَانَ عَـقِبَةُ الْمُكَذِّبِينَ
(so travel through the earth, and see what was the end of those who denied). Allah said next,) (3:137 end...)