Taha 20:32–36

وَأَشْرِ‌كْهُ فِي أَمْرِ‌ي (and make him share my task - 20:32): Sayyidna Musa (علیہ السلام) had the power to appoint Sayyidna Harun (علیہ السلام) as his Wazir on his own, but he petitioned to Allah Ta` ala to confer the appointment on his brother in order to seek His grace. Besides, he wanted him to share his prophethood and his mission and this power does not rest in any Prophet. Therefore he specially prayed to Allah Ta` ala to make him a partner in his mission.

Good companions are a help in the better performance of worship and Dhikr (remembrance)

كَيْ نُسَبِّحَكَ كَثِيرً‌ا وَنَذْكُرَ‌كَ كَثِيرً‌ا (So that we proclaim Your purity a lot and remember You a lot - 20:33, 34). The advantage of making Sayyidna Harun a Wazir and a partner in prophethood would be that both of them together would be able to pray to Allah Ta` ala and glorify His name more often. Here the question may arise that a man by himself can also pray as often as he desires, so where was the need for a companion? The answer to this is that good companions and a conducive environment definitely contribute towards the better performance of worship and Dhikr. A person whose friends are negligent about Allah cannot devote himself to His worship with the same quality and quantity as the person who is fortunate to have the company of pious men and righteous friends devoted to Allah's worship and Dhikr.

Here Sayyidna Musa (علیہ السلام) ended his petition, and he was rewarded with the good news that Allah Ta` ala, the Almighty, had granted all his requests قَالَ قَدْ أُوتِيتَ سُؤْلَكَ يَا مُوسَىٰ (you have been granted your request 0 Musa - 20:36).