In addition to Aayah 3, look at aayah 129 of an-Nisaa.Allah سبحانه وتعالى said in the Quran
This miskiin guy was not obligated in the first place to ask permission from his wife to marry a second wife, yet you are bashing him for planning to do this innocent gesture.
وإن خفتم ألا تقسطوا في اليتامى فانكحوا ما طاب لكم من النساء مثنى وثلاث ورباع فإن خفتم ألا تعدلوا فواحدة أو ما ملكت أيمانكم