(And remember Our servants, Ibrahim, Ishaq, and Ya`qub, Ulil-Aydi wal-Absar.) meaning, righteous deeds, beneficial knowledge, strength in worship and insight. `Ali bin Abi Talhah reported that Ibn `Abbas, may Allah be pleased with him, said:
أُوْلِى الاٌّيْدِى
(Ulil-Aydi) "Of great strength and worship;
وَالاٌّبْصَـرُ
(wal-Absar) means, understanding of the religion." Qatadah and As-Suddi said, "They were given strength in worship and understanding of the religion."
In verse 48, it was said: وَالْيَسَعَ (and [ remember ] al-Yasa`). Sayyidna al-Yasa (علیہ السلام) is a prophet from among the prophets of Bani Isra'il, peace be upon them all. He has been mentioned in the Qur'an only at two places, once in Surah Al-An` am and then, here in Surah Sad. No details have been mentioned at any of the two places, rather his name appears there as part of a list of the blessed prophets.
Historical chronicles report that he is a cousin of Sayyidna Ilyas (علیہ السلام) and was his deputy. He lived in his company and was made a prophet after him. Details about him appear in the Bible, the Book of Kings I, Chapter 19, and Kings II, Chapter 2, and elsewhere. There he has been mentioned by the name of اِلِیشَع بن سافط (Elisha son of Safit).
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 48–53
For which special assignment does God choose messengers from amongst human beings? The special mission of prophets entails that they make men aware of the fact that their real destination is the Hereafter, and that they should prepare themselves for it. This is the most crucial problem for man, one which warrants utter seriousness.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.