Fussilat 41:33

<h2>The Virtue of calling Others to Allah</h2><p>وَمَنْ أَحْسَنُ قَوْلاً مِّمَّن دَعَآ إِلَى اللَّهِ</p><p>(And who is better in speech than he who invites to Allah,) means, he calls the servants of Allah to Him.</p><p>وَعَمِلَ صَـلِحاً وَقَالَ إِنَّنِى مِنَ الْمُسْلِمِينَ</p><p>(and does righteous deeds, and says: "I am one of the Muslims.") means, he himself follows that which he says, so it benefits him as well as others. He is not one of those who enjoin good but do not do it themselves, or who forbid evil yet they do it themselves. He does good and avoids doing evil, and he calls people to their Creator, may He be blessed and exalted. This is general in meaning and applies to everyone who calls people to what is good and is himself guided by what he says. The Messenger of Allah ﷺ is the foremost among people in this regard, as Muhammad bin Sirin, As-Suddi and `Abdur-Rahman bin Zayd bin Aslam said. It was also said that what was meant here is the righteous Mu'adhdhin, as it was mentioned in Sahih Muslim:</p><p>«الْمُؤَذِّنُونَ أَطْوَلُ النَّاسِ أَعْنَاقًا يَوْمَ الْقِيَامَة»</p><p>(The Mu'adhdhins will be the ones with the longest necks on the Day of Resurrection.)" In As-Sunan it …

And who is better in speech than him who prayeth unto his Lord and doeth right, and saith: Lo! I am of those who are muslims (surrender unto Him).

Who is better in speech than one who calls (men) to Allah, works righteousness, and says, "I am of those who bow in Islam"?

And who is better in speech than he who [says: "My Lord is Allah (believes in His Oneness)," and then stands straight (acts upon His Order), and] invites (men) to Allah's (Islamic Monotheism), and does righteous deeds, and says: "I am one of the Muslims."

And who is better in speech than someone who calls to God, and acts with integrity, and says, “I am of those who submit”?