And so Mari, the grandson of Rav Huna, son of Rabbi Yirmeya bar Abba, taught in a baraita: One should only take leave of another from involvement in a matter of halakha, so that, consequently, he will remember him; whenever he recalls the one from whom he took leave, he will think well of him because of the new halakha that he taught him.
With regard to one’s intent during prayer, it was taught in a baraita that Rabbi Yehuda said: This was the custom of Rabbi Akiva, when he would pray with the congregation he would shorten his prayer and go up, due to his desire to avoid being an encumbrance on the congregation by making them wait for him to finish his prayer. But when he prayed by himself he would extend his prayers to an extent that a person would leave Rabbi Akiva alone in one corner of the study hall and later find him still praying in another corner. And why would Rabbi Akiva move about so much? Because of his bows and prostrations. Rabbi Akiva’s enthusiasm in prayer was so great, that as a result of his bows and prostrations, he would unwittingly move from one corner to the other.
I might have thought that one could pray as many times as he wishes throughout the entire day; it has already been articulated by Daniel, with regard to whom it is stated: “And three times a day he knelt upon his knees and prayed.” This teaches that there are fixed prayers.

