Surah At-Taubah (The Repentance), Verse 42

لَوْ كَانَ عَرَضًا قَرِیْبًا وَّسَفَرًا قَاصِدًا لَّاتَّبَعُوْكَ وَلٰكِنْ بَعُدَتْ عَلَیْهِمُ الشُّقَّةُ وَسَیَحْلِفُوْنَ بِاللّٰهِ لَوِ اسْتَطَعْنَا لَخَرَجْنَا مَعَكُمْ یُهْلِكُوْنَ اَنْفُسَهُمْ وَاللّٰهُ یَعْلَمُ اِنَّهُمْ لَكٰذِبُوْنَ 

Law kaana 'aradan qareebanw wa safaran qaasidal lattaba'ooka wa laakim ba'udat 'alaihimush shuqqah; wa sayahlifoona billaahi lawis tata'naa lakharajnaa ma'akum; yuhlikoona anfusahum wal laahu ya'lamu innahum lakaa ziboon

“If there had been immediate gain (in sight), and the journey easy, they would (all) without doubt have followed thee, but the distance was long, (and weighed) on them. They would indeed swear by Allah, "If we only could, we should certainly have come out with you": They would destroy their own souls; for Allah doth know that they are certainly lying.”

Quran 9:42 (Yusuf Ali Translation)