Waqala moosa in takfuroo antum waman fee al-ardi jameeAAan fa-inna Allaha laghaniyyun (surah Ibrahim: 8)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(14:8) And Moses said, "If you prove thankless, you and all the dwellers of the earth know that Allah does not stand in need of any of you, for He is All Sufficient and worthy of all praise by Himself." *13

Wa qaala Moosaaa in takfurooo antum wa man fil ardi jamee`an fa innal laaha la Ghaniyyun Hameed

*13) It should be noted that a reference to Prophet Moses and his people has been made here to warn the people of Makkah of the consequences of their ingratitude towards this favour of Allah that He had raised Prophet Muhammad (Allah's peace be upon him) from among them. This was a timely warning, for at that time they were showing ingratitude by rejecting that Message. They were, therefore, warned to learn a lesson from the miserable condition of the Israelites, which was the result of their ingratitude to and rebellion against Allah's favours.
As the Quraish themselves could see the consequences of that rebellious attitude of the Israelites, they were, so to say, asked this question: "Do you also desire to meet with the same consequences by showing ingratitude towards the Message. which is a great favour to you?"
Obviously, the great favour which was shown to the Quraish was that Muhammad (Allah's peace be upon him) was raised from among them with that Message about which he assured them over and over again: "Accept this Message of mine: all the Arabs and the non-Arabs will surrender and submit to you?"