Idha, āvuso, bhikkhu samathapubbaṅgamaṁ vipassanaṁ bhāveti.   Take a mendicant who develops serenity before discernment.  
Tassa samathapubbaṅgamaṁ vipassanaṁ bhāvayato maggo sañjāyati.  
As they do so, the path is born in them.  
Puna caparaṁ, āvuso, bhikkhu samathavipassanaṁ yuganaddhaṁ bhāveti.  
Another mendicant develops serenity and discernment in conjunction.  
Tassa samathavipassanaṁ yuganaddhaṁ bhāvayato maggo sañjāyati.  
As they do so, the path is born in them.  

“Tena hi tvaṁ, vaccha, dve dhamme uttari bhāvehi—samathañca vipassanañca.   “Well then, Vaccha, further develop two things: serenity and discernment.  

sāriputto, bhikkhave, aḍḍhamāsaṁ anupadadhammavipassanaṁ vipassati.   For a fortnight he practiced discernment of phenomena one by one.