Translation of the verse 7 from Surah Al-Anfal : Number of verses 75 - - page 177 - Part 9.
And (remember) when Allah promised you (Muslims) one of the two parties (of the enemy i.e. either the army or the caravan) that it should be yours, you wished that the one not armed (the caravan) should be yours, but Allah willed to justify the truth by His Words and to cut off the roots of the disbelievers (i.e. in the battle of Badr).
*5). God's promise was that the Muslims would be able to overcome whichever of the two parties they wished to attack - the trading caravan or the Quraysh army.
*6). This refers to the trading caravan which had some 30 to 40 armed guards for protection.
Source : Al-Anfal Verse 7: