Had it been an easy gain and a moderate trip, the hypocrites (9:42)

﴿لَوْ كَانَ عَرَضًا قَرِيبًا وَسَفَرًا قَاصِدًا لَّاتَّبَعُوكَ وَلَٰكِن بَعُدَتْ عَلَيْهِمُ الشُّقَّةُ ۚ وَسَيَحْلِفُونَ بِاللَّهِ لَوِ اسْتَطَعْنَا لَخَرَجْنَا مَعَكُمْ يُهْلِكُونَ أَنفُسَهُمْ وَاللَّهُ يَعْلَمُ إِنَّهُمْ لَكَاذِبُونَ﴾
[ التوبة: 42]

9:42 Had it been an easy gain and a moderate trip, the hypocrites would have followed you, but distant to them was the journey. And they will swear by Allah, "If we were able, we would have gone forth with you," destroying themselves [through false oaths], and Allah knows that indeed they are liars.

If the Prophet had called the hypocrites who asked for permission to stay behind to an easy reward and a journey that was not difficult, they would have followed him; but the distance he called them to cover to get to the enemy was too great for them, so they stayed behind.
These hypocrites who asked for permission to stay behind would swear by Allah when the Prophet returned to them, saying that if they could have gone out to fight with them they would have done so.
They destroy themselves by exposing themselves to Allah’s punishment, because they stayed behind and then swore a lie.
Of course, Allah knew they were lying in what they claimed and in what they swore.

Had it been a near gain (booty in front of them) and an easy journey, they would have followed you, but the distance (Tabuk expedition) was long for them, and they would swear by Allah, "If we only could, we would certainly have come forth with you." They destroy their ownselves, and Allah knows that they are liars.

phonetic Transliteration

Law kana AAaradan qareeban wasafaran qasidan laittabaAAooka walakin baAAudat AAalayhimu alshshuqqatu wasayahlifoona biAllahi lawi istataAAna lakharajna maAAakum yuhlikoona anfusahum waAllahu yaAAlamu innahum lakathiboona

Abdullah Yusuf Ali - Translation

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.

Safi-ur-Rahman al-Mubarakpuri

Had it been a near gain and an easy journey, they would have followed you, but the distance was long for them; and they would swear by Allah: "If we only could, we would certainly have come forth with you." They destroy themselves, and Allah knows that they are liars.

Page 194 English transliteration