Parshas Mishpatim Chapter 23 Verse 25:

``You must serve H-shem, your G-d, and He will bless your bread and your water.``

Rabbi Yoseph Albo (1380–1444) a Jewish philosopher and rabbi who lived in Spain during the fifteenth century, writes in his classic work, Sefer ha-Ikkarim ("Book of Principles"), that Chazal teach that “you must serve H-shem” refers to prayer and this service [of prayer] is a segula (remedy) to bring benefit and blessing in all aspects; as the verse concludes, “and He will bless your bread and your water`. The verses following continue the benefits of the service of H-shem; `I will eliminate sickness from your midst. No woman will suffer miscarriage or remain childless in your land. I will cause the number of your days to be full”.

We find throughout Tanach that prayer brings about all of these blessings:

Prayer halted the famine in Dovid Hamelech`s days (Melachim II: 21). It healed king Chizkiyahu from his illness (Melachim II:25). It delivered Chana (the prophet Shmuel `s mother) from her childlessness (Shmuel I, 1:10) and it fulfilled the days of King Chizkiyahu (Yeshaya 38:5) giving him an additional fifteen years after it was decreed that he die. And just as well it granted clemency to Klal Yisrael for the sin of the Golden Calf (Shemos 32:11). So we see in all areas mentioned in the verse following the directive to pray to H-shem, prayer was responsible for averting the bad decrees.

There`s more. Prayer brought about salvation from our enemies as the later verse testifies: “I will make all your enemies turn their backs to you” [a connotation that they will be defeated and retreat] as demonstrated by the downfall of Sancherev and his camp (Melachim II, 19:20) and the redemption from Egypt which came about earlier than it was supposed to, through the cries of the B`nei Yisrael (Shemos 2:13) in Egypt.

After giving all these examples from Tanach, Rabbi Albo concludes, “So we find that prayer is like a balm that contains the cure to many ailments and helps all peoples. Even the wicked can realize salvation through prayer as we see by the evil King Menashe who prayed and repented in his time of trouble and was granted salvation (Divrei Hayamim II, 33:13)”.
(Mayan Hashevuah)

We must understand the benevolence of the Almighty Who has given us this opportunity to speak with him about our troubles and a means to salvation