Atha kho āyasmā sāgato yena ambatitthassa jaṭilassa assamo tenupasaṅkami; upasaṅkamitvā agyāgāraṁ pavisitvā tiṇasanthārakaṁ paññapetvā nisīdi pallaṅkaṁ ābhujitvā ujuṁ kāyaṁ paṇidhāya parimukhaṁ satiṁ upaṭṭhapetvā.  
Just then Venerable Sāgata went to the hermitage of that dreadlocked ascetic and entered his fire hut. After preparing a spread of grass, he sat down, crossed his legs, straightened his body, and established mindfulness in front of him. ambatitthassa → ambatitthakassa (bj, pts1ed); ambatitthaṁ (sya-all)

Idha, bhikkhave, bhikkhu araññagato vā rukkhamūlagato vā suññāgāragato vā nisīdati pallaṅkaṁ ābhujitvā ujuṁ kāyaṁ paṇidhāya parimukhaṁ satiṁ upaṭṭhapetvā.  
A monk sits down in the wilderness, at the foot of a tree, or in an empty hut. He crosses his legs, straightens his body, and sets up mindfulness in front of him.

Atha kho bhagavā agyāgāraṁ pavisitvā tiṇasanthārakaṁ paññapetvā nisīdi pallaṅkaṁ ābhujitvā ujuṁ kāyaṁ paṇidhāya parimukhaṁ satiṁ upaṭṭhapetvā.  
The Buddha entered the fire hut and prepared a spread of grass. He sat down, crossed his legs, straightened his body, and established mindfulness in front of him.

parimukhaṁ kārāpenti …  
grew circle beards,
na parimukhaṁ kārāpetabbaṁ …  
grow circle beards,
Parimukhaṁ aḍḍhadukañca,  
Circle beard, and chest hair,