The English translation of MA has been published by BDK so far in 2 volumes (translated by Bhikkhu Analayo). The first volume covers 71 first discourses of MA and the PDF version can be downloaded here:
The corresponding passage of MA 63 translated here:
The Buddha said to Ānanda:
What do you think? Do you think that the young brahmin Uttara was someone other [than me]? Do not think so. You should know that he was me.
At that time, Ānanda, I wanted to benefit myself, to benefit others, to benefit many people; I had compassion for the whole world, and I sought prosperity, benefit, peace, and happiness for gods and human beings.
In the teaching taught at that time I did not reach the ultimate, the ultimate purity, the ultimate holy life, the ultimate completion of the holy life. At that time I was not able to abandon birth, old age, disease, death, sorrow, and distress, and I was not able to attain liberation from all suffering.
Ānanda, I have now appeared in this world as a Tathāgata, free of attachment, fully awakened, perfect in knowledge and conduct, a Well-gone One, a knower of the world, unsurpassable leader of persons to be tamed, teacher of gods and human beings, a Buddha, a Fortunate One.
I now benefit myself, benefit others, benefit many people; I have compassion for the whole world, and I seek prosperity, benefit, peace, and happiness for gods and human beings.
The teaching I now give leads to the ultimate, is the ultimate purity, the ultimate completion of the holy life. I have now abandoned birth, old age, sickness, death, sorrow, and distress. I have now attained complete liberation from suffering.
Interesting, as if it is denying the concept of Bodhisattva path taken by the Buddha in his previous lives