Translation:Shulchan Aruch/Orach Chaim/110

Some seifim missing--to be added...
Seif Katan 1) At a time of extreme need, for example if he is on the road [traveling] or standing to pray in a place that he might be worried or fearful that he they might interrupt him, or if he could not pray the full [amidah] with kavvanah, then he should say the prayer "havinenu" after the first three blessings.  After this, he should say the last three blessings.  He must say this [tefillah] while standing, and when he reaches his home he need not go back to [repeat his prayer].  But he may not say the havinenu prayer during the rainy season, nor in the evening of Shabbat's departure or the evening of a holiday's departure.

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Seif Katan 3) One who is going in a place [where there are] bands of wild animals or robbers should say this prayer:  "Your people Israel's needs are many..."* He does not need to say the first three or the last three blessings (of the amidah) and may say this prayer on the road, as he walks along.  And if he can stand, then let him stand (to pray).  But once he gets to a settled area and his presence of mind returns, then he must go back and say the 18 blessings (of the regular prayer).  Rema:  If he did not go back and pray, it is as if he had forgotten to pray entirely, and this situation is explained earlier in Chapter 108.  This is the position of the Beit Yosef.


 * *(Your people Israel's needs are many but their presence of mind to ask Your help is limited. May it be desirable before You, Adonai Eloheynu, that You should grant a sufficient livelihood to each individual and supply every living being with what he lacks.  Blessed are You, Adonai, who harkens to prayer.)

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Seif Katan 8) On entering the house of study, one should pray:  "May it be desireable before You, Adonay our God and the God of our ancestors that I should not stumble in a matter of discussing the Law..."  And on his exiting, he should say:  "I give thanks before You, Adonay my God, that You made my place among those who occupy the house of study."

שולחן ערוך אורח חיים קי