Ashrei and Tehillah leDavid¹ (A Psalm of Praise by David) are said and you should concentrate well when reciting it, especially when reciting the verse, Posei'ach es yadecha … [You open Your hand] (as was mentioned in Ch. 14: 2 above).

footnotes: ¹ Psalm 145.

After Ashrei, Lamenatzei'ach² is said.³ is said and not during the recitation of Ashrei, Lamenatzei’ach, and Uva letzion. To do so would divert the congregation’s concentration. (Mishnah Berurah 132:3) This Psalm is omitted on the following days; Rosh Chodesh, Chanukah, Purim; the same rule applies in a leap year on the fourteenth and fifteenth days of Adar I, the day before Pesach, the day before Yom Kippur, and on Tishah be'Av. Neither it is said in the house of a mourner. On a day that Lamenatzei'ach is omitted Eil erech apayim is also omitted.

footnotes: ² Psalm 20. ³ Any public announcement should be made before Ashrei

We say the Kedushah that is included in Uva letziyon with the Targum (Amaraic translation). You should be very careful to recite it with concentration; and the Targum should be said quietly. (In a mourner's house the verse Va'ani zos berisi is omitted).

It is forbidden to leave the synagogue before reciting this Kedushah.

You should glorify this [Kedushah] by saying it together with the congregation; and therefore, if you arrive at the synagogue when the congregation is reciting it, you should say it with them even before you say your prayers. You may recite this [Kedushah] even before saying the two verses [preceding it] that is, Uva letziyon … and Va'ani zos berisi … and after [you conclude the Kedushah], you say these two verses; and certainly you may skip Ashrei and Lamenatzei'ach in order to say this Kedushah together with the congregation, and afterwards say what you have skipped.

Then we say Aleinu leshabei'ach … (It is our obligation to praise …) and this should be said with great reverence. Joshua instituted [this prayer] when he conquered Jericho. Then we say the Psalm for that day as well as other Psalms, every community, according to its custom.

Upon leaving the synagogue you recite the verse Hashem nacheini (Hashem, lead me).⁴ You should bow towards the Aron Hakodesh like a pupil taking leave from his master. When leaving the synagogue, you should not leave with your back toward the Aron Hakodesh, but you should walk out sideways, and do the same when you descend from the reading lectern.

footnotes: ⁴ Psalms 5:9.

When leaving the synagogue, it is forbidden to run or walk with long strides, because this would make it appear as if your stay in the synagogue was like a burden to you. This only applies when you leave to go to work,⁵ rush and come back so much the sooner. (Mishnah Berurah 90:43) but if you leave the synagogue to go to a Beis Midrash (house of study)⁶ 90:43) then it is considered a mitzvah if you rush.

footnotes: ⁵ If you leave with the intention to return to the synagogue it is preferable that you do ⁶ In order to study Torah (Mishnah Berurah