قَالُوا۟ كَذَٰلِكِ قَالَ رَبُّكِ ۖ إِنَّهُۥ هُوَ ٱلْحَكِيمُ ٱلْعَلِيمُ

EnglishSaheeh International: They said, "Thus has said your Lord; indeed, He is the Wise, the Knowing."
TamilJan Trust Foundation: (அறிவு மிக்க புதல்வர் பிறப்பார் என்று;) "இவ்வாறே உம் இறைவன் கூறினான், நிச்சயமாக அவன் ஞானம் மிக்கவன்; (யாவற்றையும்,) நன்கறிந்தவன்" என்று கூறினார்கள்.
SinhalaRuwwad Center: “නුඹලාගේ පරමාධිපති පවසා ඇත්තේ එලෙස ය. නියත වශයෙන් ම ඔහු සර්ව ඥානී මහා ප්‍රඥාවන්ත ය.” යැයි ඔවුහු පැවසූහ.
UrduMaulana Muhammad Junagarhi: انہوں نے کہا ہاں تیرے پروردگار نے اسی طرح فرمایا ہے، بیشک وه حکیم وعلیم ہے.
JapaneseRyoichi Mita: かれらは言った。「あなたの主がこう仰せられたのです。本当にかれは英明にして全知であられます。」
ChineseMa Jian: 他们说：你的主是这样说的，他确是至睿的，确是全知的。

Tafsir of 51:30

The Guests of the Prophet Ibrahim We mentioned this story before in Surah Hud and Al-Hijr. Allah said, هَلْ أَتَاكَ حَدِيثُ ضَيْفِ إِبْرَهِيمَ الْمُكْرَمِينَ (Has the story reached you, of the honored guests of Ibrahim), whom Ibrahim honored and who, قَالُواْ سَلَماً قَالَ سَلَمٌ (they said: "Salaman!" He answered: "Salamun.") وَإِذَا حُيِّيتُم بِتَحِيَّةٍ فَحَيُّواْ بِأَحْسَنَ مِنْهَآ أَوْ رُدُّوهَآ (When you are greeted with a greeting, greet in return with what is better than it, or return it equally.)(4:86) So the Friend of Allah chose a better reply in return for their greeting, implementing Allah's command: Reciprocating the greeting with the term Salamun is stronger than the greeting using the term Salaman. The three angels; Jibril, Mika'il and Israfil came to Ibrahim in the image of handsome young wonderfully graceful men.…

Source: Ibn Kathir (Abridged)