As-Salaam alaikum,
''And whosoever puts his trust in Allah, He shall suffice him.'' (Talaq 65:3)
''And in Allah let the believers put all their trust''. (Ibrahim 14:11)
In the Hadith also, it is related that the Prophet, Sallallahu alaihi Wasallam, said:- ''There shall enter Paradise of my community 70,000 without reckoning: those are they who that neither make auguries, nor brand themselves, nor use spells, but trust their Lord.'' (Bukhari)
In his book titled: 'Kitab Sidq--The Book of Trithfulness' Imam Abu Sa'id al-Kharraz told us that ''Trust in itself and its manifestation in the heart, is this: to believe in Allah and to rely on Him, taking rest and assurance in Him as regards all that He has guaranteed; to expel from the heart all anxiety over the affairs of this world, and the means of sustenance, and every matter of which Allah has Himself taken charge; and to know that of every matter of which man stands in need, be it of this world or the next, Allah is the ruler and provider, for none but Allah can bring it to him, and none but Allah can withhold it from him.
In trust, all desire and trepidation must depart from the heart, with all fear, if these be connected with other than Allah: for a man must have confidence in Him, and a full knowledge and firm conviction that Allah's hand is outreached towards him, to provide him with all that he seeks-- for no good shall befall him save by Allah's Command and no evil shall overtake him save with His leave.''