When his Lord told him: “Submit wholly to Lord”, he said: “I have already submitted wholly to my Lord, the Lord of all worlds”.
“Submit wholly to Lord” means to submit one’s soul, life, and body to the Lord of the universe. That means one has to submit every blessing like wealth, house, children, parents, and spouses to the Lord. When Queen Sheba witnessed the abundant bounty bestowed to Prophet Suleiman she said: “My Lord, indeed I have wronged to my soul, and I have submitted wholly to Allah, the Lord of all worlds, along with Suleiman'' as told in verse 27: 44. It is commanded to Messenger and believer to say the Fujjar through verse 40: 66: “Indeed, I have been forbidden to serve those you serve besides Lord while the Clear Proof Adhikr has come to me from my Lord, and I have been commanded to submit wholly to the Lord of the worlds”.
Today, the Arabic Quran reading Fujjar who read these verses are having an evil concept about the Lord. They are falsely claiming that they are Muslims by their mouth while they are not testifying the verse 16: 89. So they will witness against their soul that indeed they were disbelievers at the time of death vide verse 7: 37, and on the Day of Judgment vide verse 6: 130. See explanation 1: 1; 2: 116; 6: 71 and 161-163.