Marcos 11:20-25 - Bíblia Online

and as they (he and his disciples) were passing along in the morning, they saw the fig tree already withered from the root. 
Then Peter remembered, and exclaimed, "Look, Rabbi, the fig tree which you cursed is withered up." 
"Take hold on Gods faithfulness," said Jesus to them in reply. 
"In solemn truth I tell you that if any one shall say to this mountain, Up and hurl yourself into the sea! and shall not doubt in his heart, but on the contrary shall believe that what he says will happen, it will be granted him. 
That is why I am telling you that whatever you ask for in prayer, believe that you have received it, and it shall be yours. 
And whenever you stand up to pray, forgive, if you have anything against any one, that so your Father also who is in heaven may forgive you your trespasses." 

Marcos 12

and as they (he and his disciples) were passing along in the morning, they saw the fig tree already withered from the root. 
Then Peter remembered, and exclaimed, "Look, Rabbi, the fig tree which you cursed is withered up." 
"Take hold on Gods faithfulness," said Jesus to them in reply. 
"In solemn truth I tell you that if any one shall say to this mountain, Up and hurl yourself into the sea! and shall not doubt in his heart, but on the contrary shall believe that what he says will happen, it will be granted him. 
That is why I am telling you that whatever you ask for in prayer, believe that you have received it, and it shall be yours. 
And whenever you stand up to pray, forgive, if you have anything against any one, that so your Father also who is in heaven may forgive you your trespasses." 

Marcos 12