Surah As-Saf 61:2

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لِمَ تَقُولُونَ مَا لَا تَفْعَلُونَ

O you who have believed, why do you say what you do not do?

Translation: Saheeh International

Tafsir

O you who believe why do you say in demanding to participate in the struggle what you do not do? for you retreated at Uhud.

Excerpt from Tafsir al-Jalalayn, commentary on 61:2, via Quran.com. The reader has the full commentary and 9 more tafsirs.