This verse (chaupai) is from the Balakanda chapter of Shri Ramcharitmanas.
होइहि सोइ जो राम रचि राखा। को करि तर्क बढ़ावै साखा॥ अस कहि लगे जपन हरिनामा। गईं सती जहँ प्रभु सुखधामा॥
This verse (chaupai) appears in Balakanda during the conversation between Shiva and Parvati.
Meaning : Whatever Lord Ram has destined will happen. Who can change it by arguing? Saying this, Lord Shiva began to chant the name of Hari, and Sati went to the place where Lord Ram, the abode of bliss, was present.